Place a 12-inch camp Dutch oven over 15 hot charcoal briquettes.
Pour contents of each peach cans into oven. Spread dry cake mix evenly over peaches. Sprinkle rolled oats over the cake mix. Sprinkle cinnamon over all to taste. Cut butter into equal slices and arrange on top.
Put lid on top of oven and place 10 hot charcoal briquettes in a checkerboard pattern on top. Bake for about 45 minutes or until done.
Spoon into bowls and add cream, ice cream, or whipped cream, if desired.