I have been smoking meats while at camp like this for a while, but do not have a video camera to record the process. One of these days I will purchase a GoPro, but just have not spent the money yet. This video shows the basic idea and premise for smoking meat over a campfire. I have found that using bark to build a little structure around several wooden racks works quite well. I am also partial to using my squirrel cooker to put the meat on and then surround my dinner with a bark structure, that way I can use the rotisserie feature of the cooker. When it gets a bit drier I will do a post on squirrel cookers.
Here is the instructional video. Very well done.