Every summer when we go camping with my parents my dad breaks out his Dutch oven for some cobbler--which has to be my favorite summer treat. It all starts with a cake mix, so it belongs here, right? We usually do peach, but cherry is also a favorite in our clan (especially with chocolate cake), and a can of cherry pie filling plus a can of chunk pineapple is supper yummy. Here's the basic recipe:
1 large can of peaches (or other fruit if you prefer).
1 white or yellow cake mix
1 stick of butter
1/4-1/3 cup of cinnamon sugar
1-12 oz can of lemon-lime soda
My dad has a gas stove made for camping that he cooks his Dutch oven dishes on, which is way simpler than using coals, but if you want to use coals, here's a recipe with cooking directions, which I imagine would be about the same, though my recipe is way simpler!)
First, line the dutch oven with tin foil for easy cleanup later. Dump the fruit in the bottom of the Dutch oven and spread it evenly across the bottom Sprinkle on the cake mix as evenly as you can, then sprinkle the top with cinnamon sugar until it looks like there's enough for your taste. Chop the stick of butter into pats and scatter them across the top of everything so it covers the top reasonably well. Finally, pour the can of soda on the dish and cover. Bake for 1 hour.
I imagine you could get similar results in a Dutch oven put in your oven at 350 degrees for an hour (along with getting the awesome flavor that comes from Dutch ovening.)