Food that doesn't have to be refrigerated?

I'm going to a camp this coming week and it's at a college. they serve food in the cafeteria but i heard it's really bad, and people tend to get sick from it, so i really don't want to eat alot of it. but the thing is they don't have refrigerators or microwaves. so i need some foods that are good and filling that don't have to be refrigerated or microwaved. does anybody have any good suggestions?