Hobo dinners. Dump cake in a Dutch oven. Pocket pizzas, grilled PB and J's, grilled cheese, and/or fruit cobblers using campfire sandwich toasters (the cast iron clamshell style...avoid the aluminum ones.) Shish Kabobs are simple...try fruit kabobs, too. Google "Coca Cola Chicken." You can make pizza in a Dutch oven or make deep fried pizzas using Pillsbury (or similar) ready to bake biscuits. You can make descent donuts using the same biscuits: just roll them in sugar and cinnamon.
THIS.
In case you're a noob, and BTW, nothing wrong with that, we all started there...I'll take the liberty of explaining some of these mentioned by m47:
Hobo Dinner: Tin foil is the key. Heavy duty. Take any kind of meat, (hamburger pattie, chicken breast, steak, etc- check the temp, if needed) half of a sliced potato, a small can of veg-all or any fresh veggie, (corn, peas, carrots, broccoli, etc) add a few pats of butter and even dry gravy mix. wrap in a foil pouch and throw it on the coals for 15-20 minutes and serve. Make each one individual for the eater. it's special that way when junior gets his own hobo dinner, just like he wanted it. Great and easy dinner, this one is hard to screw up. as long as the foil is sealed well it wont burn very easy..
Dump cake: grease a seasoned dutch oven with lots of butter. use your choice of cake mix with all the ingrediaents mixed and ready. set directly on hot coals and cover lid with coals for about 15-20 minutes. serve with friut or pour frosting over hot cake and let cool before eating.
get creative and experienment with bisquick mix too, drop biscuits made in a skillet or dutch oven are great. also good for cakes, etc.
ALSO: plus 1 on the biscuits-as-donuts-thing. Awesome donuts.
good luck with the camping.