Our theme park strategy includes:
Making bagel and lunch meat sandwiches because bagels hold up better than bread.
Can of Pringles because they take up less room and hold up better than bagged chips.
Don't forget to bring packets of condiments because you can't always find mayonnaise when you are ready for lunch
Ice water is free - we always bring Mio flavor enhancer and make our own punch.
we also bring apples and peanut butter fro snacks along with granola bars and other snack items.
We have done Disney for less than $20 in food costs by bringing breakfast for the room (buying milk), packing lunch and eating a $16 pizza back at the room.