This site has some awesome camping dinner ideas. My favorites are always the foil packs. Everyone can put together their own and as long as it's completely sealed it's easy to cook. Will have to try some of these this summer.
Foil Packet Garlic Shrimp: Combine 1/2 stick softened butter, 1 C chopped parsley, 2 chopped garlic cloves, and salt and pepper. Toss with the juice of 1 lemon, 1 pound unpeeled large shrimp & a big pinch of red pepper flakes. Divide between 2 foil packets. Grill over high heat for 8 minutes. Double or triple as needed.