Ballpark the temperature. Place the dutch oven in the coals and then hold your hand over it at the level of the sides. Count backwards by 50 starting at 550 (550, 500, 450) until you have to remove your hand. That will give you an approximate temperature produced by your coals.
Fried Pies: You'll need 1 can biscuit mix and 1 can of your favorite pie filling (apples, peaches, cherry). Roll the biscuits out to about six inches or so. Put a tablespoon or two of pie filling into biscuit and fold over pressing edges close with a fork. Brown in a skillet in some butter and when golden brown sprinkle with powered sugar. Homemade pie right at the campsite.