Where do you set your dutch oven when cooking, on the ground or on a stand. I saw a picture where someone appeared to have theirs set in a large metal pan like a pig feeding pan. When cooking something that takes a long time to cook when do you add more charcoal. Do you add all new charcoal or do you add to what is there? We have done a few things in ours but have never been around any experienced dutch oven cooks.