We like a blend of convenience and savings. I don't try to pinch every penny I can, but at the same time, I don't want to spend an absolute fortune on things either. I use coupons when I grocery shop and I bought things for our trip as I found them on sale locally for a few weeks before hand. I think if budget is a concern, just adjusting how you and your family think of spending can be a big part of making things less expensive but still enjoyable. Attitude is a big factor.
So here are some of the things we did for our recent trip (which ended on Monday) that saved us some $$$$
1. Made an entire loaf of PB&J's ... placed each sandwich in a regular cheap sandwich bag, not a ziploc, and then placed all of them back in the bread bag. We had these as snacks on the drive down and in our room for a couple of days. We still ate meals at restaurants and in the park, but this helped cut down on some of the snacking and made it possible for us to go longer between meals during the drive. My hubby has a big appetite, so he also ate a PB&J along with an in-park meal if whatever he'd purchased wasn't quite enough to fill him up. We wouldn't do this in a nice restaurant, but when buying counter service food and eating at an outside table, I didn't have a problem with it. We also took dry cereal and plastic bowls for breakfast in our room. We bought a 1/2 gallon of milk at the food court (could have save $$ by buying it before entering Disney, but we forgot) ... this provided breakfast two days and some snacks a well. I'd bought small boxes of Malt-o-Meal versions of fruit loops and lucky charms which Publix had for $1 and used 50 cent coupons which they doubled ... so I actually got the cereal for free! Was this as convenient as just pulling out the Visa everytime we wanted a bite? No ... but I also don't have $500 in food charges to look forward to on my next credit card statement and our tummies were just a full as anyone else's.
2. We took LOTS of frozen bottles of water (buy 1 get one free 12 packs for $3.99) and Capri Sun (3 boxes/$5) drinks as well as some 2 ltr. sodas (used $1/4 coupons when they were on sale for 89 cents.) We put some of the frozen waters in a large cooler but one 12 pack had to just sit in the van ... they were frozen solid when we left home and were still partially frozen 9 hours later! We transferred a few waters and Capri Suns to our small soft sided coolers to take into the parks each day. We drank the 2 ltr. soft drinks in our hotel rooms in the mornings and at night and in the van on the drive. Even if we purchased a drink in a cup with ice at a convenience store or fast food place during the drive, we were able to refill it from our own stash.
3. I found the single packs of Crystal Light tip on this site long before our trip so I bought a box of the lemonaid packs (14 packs for about $4) I wish I'd bought them when they were on sale for 2 packs/$7 but I didn't so I paid a little more ... but it was still a great savings to use these packs with ice water from counter service restaurants with our park meals or even in our own bottles of water. If you don't want to use Crystal Light, you could also put a pack of the pre-sweetened Kool-aid or something similar in your own little container to carry into the park. Just be sure it is in something that seals very well ... you don't want sticky powdery staining stuff all over everything in your bag.
4. Be sure to take a bottle of Tylenol or Motrin or your preferred meds into the park if you are at all prone to head aches or needing this type medication. You can buy individual packs in many of the gift shops, but it's much cheaper to take your own. Same for sunblock, antacids, chapstick, tissues and pretty much anything else.
5. Pack a lightweight jacket even if you don't think you'll need it (unless perhaps it's mid summer and absolutely hot 24 hrs a day) We packed a windbreaker for our daughter but our friend didn't for his daughter ... buying a Disney jacket in the park makes a nice souvenir but it's expensive.
6. When you do buy food in the parks or at DTD or at the resorts consider what you are getting for the money. I found the kiddie Mickey waffles and bacon to be worth the $3.99 price tag ... (and for young kids with small appetites you could even split one order so that each gets one waffle and one strip of bacon.) I also didn't think $4.95 was a bad price for a sandwich at the Earl of Sandwich (they were yummy too) but I did think that $3.99 was ridiculous for their kids cheese or PBJ (this is with no sides or drinks) If we were to go back I wouldn't hesitate to eat at EoS, but I'd either buy the girls an adult sandwich which would have more on it than the kiddie ones or just get them something else all together. You can also get a cup of soup for $0.95 and a side salad for under a dollar there. Really if you have a small appetite you could have a bowl of soup and a salad and have a meal for only $2. Similarly at Cosmic Rays, I had a hamburger and fries for about $6 and drank water (to which I added Crystal Light) I loaded the burger up with toppings at the toppings bar and had enough lettuce and tomato and pickles to make my daughter a small salad to go with her kiddie chicken meal. On the other hand, another member of our group spent over $10 on a double cheeseburger with bacon, fries and a soft drink. It's only $4 difference, but if we did the same thing for 2 meals a day for 4 days, I'd spend $32 less than him. If each adult member of our group did that it would be $128.
7. Go to Ghirardelli.com to get a coupon for B1G1Free sundaes. They are HUGE and for $6.50 you'll get two sundaes which can easily be split between 4 people (or maybe even more!) ... we went to Ghirardelli in DTD and it was fantastic! Even a full three scoop banana split is considered a sundae.
8. Put your kids on a budget ... whether it's their own money that they've earned and saved for the trip, or if you are just giving them money ... don't be an open cash box. Even fairly young children can understand "You have $XX for the next X days ... do you really want to spend over half of it on this one item or would you rather look around for a while and make a decision. You'll get to spend all your money, but I just want you to be sure you're happy with what you buy." My daughter bought things and enjoyed 'window' shopping and didn't feel deprived at all with this method. Heck, she even bought us gifts with her own money (which I wish she hadn't done but it was really sweet) ... on the other hand, her friend who went with us had 3 items before we'd even settled in to our room. If she so much as looked at something her dad was there with cash in hand ... and the entire first few days of the trip went the same way ... balloons and lighty-spinning things and jewelry and dolls, etc. Nothing seem to have as much meaning to her because she got so much and as soon as she got one thing the last thing was forgotten. I did notice that on the last day of the trip 'dad' was decidedly slower to whip out his wallet.
We cut corners on some things to be able to splurge on others. I really think the 'fun' of being able to enjoy a super yummy treat or have a special nick-nack sometimes justifies the higher cost. What's worthwhile for one person may not be for another, but the pastries in the Disney bakeries are delicious and I love pastry ... so to me it's worth paying $3 for a cheese danish even if it means I decide to drink water with my next two meals. On the other hand, it was more worthwhile to me to purchase a Disney Princess nightshirt for my daughter from DisneyDirect.com for under $10 and take it down with us than it would have been to pay a higher price of something similar in the gift shop. For my daughter a $4.50 coloring book from a cart near Cinderella's Castle was a terrific buy because she absolutely loves to color and loves princesses. I didn't try to talk her out of it or say that she could get one at Target for less ... it was special to her because of where she was buying it and I really didn't feel like it was a bad price considering some of the other alternatives. I guess all I'm trying to say is to be 'budget minded' doesn't mean you have to completely go into gorilla penny pincher mode, but at the same time it does not completely spoil the Disney experience if you do consider your budget and don't toss money around like confetti.
Hope some of this helps a little!

Elaine