peel and chop up the apples (take out the core/seeds). put the skillet over the campfire, throw in a stick of butter, the chopped up apples and brown sugar. cook until the apples are no longer hard, but not so long that it becomes apple sauce! add more butter if it starts to stick to the skillet and more brown sugar depending on how sweet you want them. and if you want to be daring throw in some cinnamon too!
the first family camping trip, i used a bag of apples (about 2lbs), this past trip, i used 4lbs and we still ran out!