when we stayed at the cheyenne in march we went for 4nights/5 days and we went though 400 euros on meals alone, that included a meal at cafe mickeys it costed roughtly 80euros, for two kids meals, and two adults meals including 1 drink each but no dessert, we also had the character tea at plaza gardens and that costed about 15e's for each adult and 11 e's for a child, it was all you can eat buffet, but get there early as they stopped serving the food at around 6.30, we also had dinner at the buffalo bills show, but i prepaid that in the uk, don't eat at the cheyenne, we did and it was horrible, in fact it was so bad i felt sick, but the breakfast was good, take snacks with you to nibble on during the day, try victorias for lunch, the croque monsiur sp?? was big we had one each but it would have done two of us, as was the mickey pizza, we orderd 3 for the kids, and 2 would have been plenty. fill your water bottle up at breakfast, they have cold water available, you can also take in yougurts from breakfast, and rolls made up with cheese/ham, and the lovely crossaints as well, we did this and then had a counter lunch as a snack, oh and if you like pizza/pasta then belle notre (i think) near small world sells lovely food and huge portions so beware, hope this helps.
enjoy