sak45acp, welcome to the group. In addition to the cardboard box oven, our Girl Scout troop uses a small trashcan (approx. 15-20gal.) to cook turkeys. The galvanized trashcan should be first burned before using it for cooking to burn off any coatings or treatments. We pound a stick (approx. 1+”) into the ground that will support the weight of the turkey, take an aluminum cake/roasting pan impale it onto the stick running it all the way to the bottom of the stick, so it is sitting on the ground to catch the juices. Impale the seasoned turkey onto the stick, you can add some water to the pan to add moisture and cover the entire thing with the inverted trashcan. Pile charcoal or wood that has developed into coals around the base of the can and onto the top (the bottom of the inverted can) of the can and cook for 15-20 minutes per pound. Add coals as necessary. Some of the best tasting turkey I have ever have eaten. We have used the same trashcan for years and you can store some of your cooking supplies in the can when storing.
Pete