When I plan a trip (not just Disney), I start with a spreadsheet that I developed. It helps me calculate the cost of airfare, hotels, food , admission etc. I use the internet to determine what the total cost of the trip will be. Sites like this one and Deb Will's are great for helping with this. You can know in advance what the price of almost anything is - even meals when you look at the menus. I've gotten so good at anticipating what we will spend on any trip that once I was only off by 17 cents between the estimate and the actual cost.
Once I know the total cost, I divide the total by the number of weeks before the trip. This tells me how much I have to save per week to meet my budget. After I know what I need to do each week, I start throwing money (literally) into a box each time I do one of the things listed below.
1. Bring lunch from home. Saves $6 per day - $6 goes into the box.
2. Use the library for best sellers rather than
Amazon. Saves $10-15 per book. The price of the book goes into the box.
3. Save change. $5/week
5. Reduce impulse spending - varies but averages $20/week. Anytime I'm in Target or Walgreens or other stores and I reach for some gatzie that I really should do without, I put it back and the price of the gatzie goes in the box when I get home.
6. Bring a 12 pack of soda to work instead of buying from machine. Saves about $6/week that goes into the box.
7. Any bonuses, cash birthday or Christmas gifts, lottery winnings or other unexpected sources of cash go into the box - this varies every year - this year its added a good $1200 to the box. I work in a field where bonuses are rare so I consider myself very lucky this year.
I also keep track of what money is in the box very carefully and keep the tally posted on the spread sheet. As deposits are due or airfare needs to be paid, the money comes out of the box and into our checking.
I never manage to pay for an entire trip this way but we have enough leeway in our monthly budget to absorb the shortfall.
I just like seeing the money build and like working toward a goal. I use this same method to save for other niceties too - like new furniture or a spiffy new bike etc.
Good luck with your budget and your trip.