I need to do this while camping.../ Remember that everything is going to shift at the bottom when the wood starts a burning. Optional~ ol' technique tried and true dig a trench about the width of the of your pot. Place a flat rock on each side of trench, make sure they overlap the little trench. Shovel coals into trench. Place pot on rocks. Presto ! A well balanced and secure cooker. Add coals as needed.