well places like Sports Authority sell collapsible aluminum ovens that you can put on the coals. never actually used on, I would imagine it would work. Its just a really thin aluminum box that folds up on itself. I`d bet a cardboard box wrapped inside and out with foil would do the same. Somehow pizza and campfire aren't two words I`d use in the same sentence. Guess you got tired of wieners or marshmallows?
