I have found several ways to save, some may not be able to apply to you but worth mentioning so others may hear.
1) military, they get a deluxe hotel for the price of a value. We have stayed at shades of green three times now for under $80 a night. Military also has discounted tickets, salute tickets, or the MYW tickets that are regular tickets that have to be bought by military but can be used by anyone, and you basically save the most only because you don't pay taxes, so if you know anyone who can get them they are the cheapest. Military also has cheaper messages, and now they have there own BBB. Food is cheaper there also, not the best but no worse than some of disneys quick service meals.
2) CM discounts, 50 to 60% off rooms, 20 to 25% off dining. Since my kids have entered college we know at least one student every year that goes there so for 8 years now we have been able to ask if we can at least use the room and food discount, we never use the ticket discount we let them save them for parents and such.
3) now since my ex is military those are my only suggestions for hotel discounts and ticket discounts. For other things here are some other suggestions to save money.
4) Disney costumes, from the park shop goodwill in sept when they put out halloween stuff, usually I can find almost every charactor there, take it home and iron it wrap it in paper and put in suitcase, on the trip put it out during rest time and your little one will never know.
5)my DGD want Elsa so bad for our trip next month and this maybe her last time before she ages out. No way am I paying $200 or more for it because Disney did not make enough for supply and demand. So I went on ebay and found a blue satin bodice dress with tulle blue skirt, and a white overlay around the neck and running down the back, it even has snowflakes I. It. It looks so close but it is a real dress, $24 shipped and she can wear it for Easter.
6) last year she wanted to be herself princess Aaliyah, we went to a Spanish store down town, got a dress in pink satin with a huge puffy underlay, $45, everyone in the park ask her to stop and take a picture, we kept getting ask if she was a movie star or what show she was on. Everyone already saw the Disney princesses, but she stood out. Also she stopped a few princesses in there track when at characters meals, they would say hello princess Cinderella or aurora and she would say they are fairy tales, I am princess Aaliyah.
7) she meals or buy kids meals, there is plenty of food not he kids meals plates for most people. Or if there are three of you buy kids meals and a salad to split. Not at counter service but at table meals, they kids meals now are like meatloaf, chicken breast, steak, and such and if you are a normal eater they are big enough for us, and I think we are big eaters. They never question you about this except if at a buffet, you have to pay adult prices.
8) ship you water from stables, and then bring ice tea or your flavors with you, nothing against this and it can save you a ton or money on drinks.
9) depending on your group size, split snacks in half, we have 4, 6 or 8 so we buy half and split it at 10 am, and the. The other half and split it at 8:30 pm, most snacks are big enough, some are not.
10) send or buy breakfast food, we don't eat big at breakfast, but we usually get milk and cereal, bagels and muffins for the week and eat in the room.
Sorry I don't have boys so no idea how to make things cheap for them, like dresses. Oh also, if military works, BBB not the name over there but is half the price of the ones in park.
I have lots more after 20 years of going on a budget but can't think now. Baby crying.