I started one of these threads on the old boards, and there were some great ideas. Several people mentioned using George Foreman grills - we're considering this for next time (we drive). In the past, we have stopped at Publix for a cooked chicken, which feeds us 2 nights - one night with frozen side dishes (Stouffers stuff) and the second night mixed up in a salad. We buy bagged salad, lunchmeats and cheese, hot dogs and chicken nuggets for the kids, and that takes care of lunch (or dinner if we've had a big lunch out). We also buy several frozen dinners - although the freezer isn't big enough, they keep for several days in the fridge. Last year we had frozen burritos that were good, along with some refried beans, chips and salsa - and we bought 2 bottles of Corona beer at the OKW store (very reasonable by the bottle) to complete the theme. We also bring some plasticware - plates, bowls, cups - that we wash and reuse. I do bring real stainless, since it's hard to eat with plastic. Don't buy anything you wouldn't want to eat at home - you don't want to be eating something that isn't great on your vacation. The first year we brought some canned soups and chili that were awful - now we always try things at home first, to be sure.
We love eating in the studio - no lines, you can take off your shoes and relax! And for a little over a hundred dollars in groceries, we eat well for the week - including plenty of fun snacks and junk food (this is a vacation, after all!)