We just used them for our trip last week, too! We did have a villa, so ordered $200 worth (breakfast foods, things like eggs and sausage, biscuits, cheese, lunchmeat, bread, frozen pizza, chicken nuggets, soy milk, bananas, fresh ground beef for tacos and shredded lettuce yum, apples, 2 cases of Dasani, butter, sour cream, chips & salsa, etc.....). Of course don't forget the beer and wine! I went through the wine in 3 days - should have ordered more, but then found okay wine at the Boardwalk's Screen Door General Store for $14 so no biggie!
In a room, I'd get milk that's shelf stable (we do soy but you can find Parmalat too) and other snacks. It's nice to have it in the room. I have found that it was especially nice (times we've stayed at the Swan & Dolphin) to have the kids munching on cereal while I'm getting us ready to go in the morning.
I did order plastic throwaway cups, but ended up only using a couple. If I were doing cereal, I'd either bring in my luggage paper bowls and plastic spoons or order them too (they're cheap at Target so don't know).
What we had leftover I gave to the Bell Services. They were thrilled!