LOTS OF GOLDFISH.. (dd5). But really bring all snacks with you. We bring our breakfast with us to the park, cause we leave the hotel early and eat within an hour of getting to the park. Bagels, pop tars, breakfast bars, dry cereal. All brought from home. Buy a refillable mug, and fill it up on your way to the park, reuse this all day with water, and if you eat at a TS get an additional refill before you leave to fill your cup up with. I get morning coffee out of room, and then pop to take to the park. This makes breakfast, drinks and snacks nearly free. (If you rent a car you could stop at a grocery store on the way, we do not so we pack it in our suit case it is fine. Things like coocie go packs, or pop tarts. I even brought juice boxes one time. This leaves lunch and dinner.
We opt for our big meal (mostly) to be lunch usually 11:00 - 12:00, and our dinner, about 1/2 the time is at the hotel as a QS, or a "nearly free" dinner. I almost always share with my dd when not on the dining plan, she picks what she wants (mostly) and we share, occationally she will share with hubby. She never eats her dinner anyway. She would rather have fruit by the foot and goldfish. We usually order delivered pizza 1 night and have extras from 1-2 more nights by ordering over. Occationally cold pizza for breakfast. If you have a car, buy an extra (or 2) pizza and keep them in the fridge. Also if you bring jelly and peanut butter with you, you can but a loaf of bread (at least some places like BCV you can) and have PB and Js for dinner. .. a whole family eats for like 5$.

I used to bring the chefboyrdee pull the lid off dinners, but more recently she hasnt eaten them. .. But if you like them they are like 1$ and fit nicely in a suitcase. You could serve them with bread and butter from your loaf you bought
I think next time I come I will bring a box of pancake mix and make mickey pancakes one night for dinner too... It is something I do at home a bit, cause it is 1 thing she actually eats.
Most importantly is planning ahead, with what you have to $$ and when you will be doing what.