Wow.. It really depends on where you're staying and for how long.
Our last trip we stayed at Saratoga for 5 days, so we basically did a normal weeks grocery shopping. We and breakfast and dinner there almost everyday, and packed snacks for during the day.
Sandwich baggies were great. We used them to pack pretzels, chips, sandwiches, etc. The kids used them to keep their coins for the pressed pennies, our money so it wouldn't get wet on anything, etc.
I too packed single serving items of peaches/pears/pudding. We packed spoons in the sandwich baggies from SSR and washed them in the evening.
Since I am [still] on vacation, we do tend to buy frozen or quick dinners. Hot dogs, mac and cheese, etc. I want to make sure we are still in our budget, but don't want to have the hassle of washing tons and tons of dishes..not to mention spend too much time in front of the stove! LOL