We heat water with the coffee maker for instant oatmeal. You could also do this for instant soup and the individual mac&cheese.
We also take nutri grain, honeybuns, poptarts, & fruit for breakfast, and cereal if you have a refrigerator for milk.
We take microwave popcorn for snacks; bread, peanut butter & jelly. If you have a refrigerator, you may want to go to Sam's and buy tubs of chicken salad, potato salad, etc.
On our last trip we ate entirely counter service & off-site, which saved us at least $200. Off-site we ate at McDonald's, Olive Garden, Joe's Crab Shack (my fav), Intl Lighthouse Lobster, Wendy's, Pizza Hut. We had planned a couple of character meals but money was tight so we canceled those and enjoyed the ice cream social instead!