One of my old favorites from girl scout camp....approximately 4 million years ago were baked apples....so easy, and it really does taste like the innards of an apple pie with a lot fewer calories, and a lot less work.
Basically, you hollow out the center of an apple (the seeds). I use a knife, but you can use an apple corer. I added a little promise butter, brown sugar, cinnamon. You can add whatever-raisins or any other seasonings.
Wrap foil around the apple and you can either place it on a campfire, charcoal, or even in an oven set at 350...assuming you are camping suburban style. They take about 40 minutes. The longer they sit, the softer they will be.