I use a small garbage can with holes in the lid and around the bottom. I build a fire around it and when smoke stops coming out of the barrel I seal it with soil and re stoke the fire. That's not really the point of my response though. I just wanted to let you know what method I was using. I've found that the size and placement of the wood is one of the most important factors. The more carefully I charge the can with the cut wood the better the results. I prefer pine also but sometimes use hardwood.