Thanks for the welcome. Someone above asked me to introduce myself. I am in my late thirties, grew up camping and hunting, did fifteen years in the Army (half active, half NG), and have BA in History. I am still an avid "wanna be" camper as I can't get out as much as I'd like. I worked a couple of years at a Girl Scout summer camp as a lifeguard/canoe instructor and that's where I saw the winebox oven get used. I found the "real" Girl Scouts to be everybit as competent and interested in the outdoors as any Boy Scout, and learned a few things. I also worked at an outdoor retail chain for a few years and so have a better than average insite into which gear works in the outdoors and why, though I certaintly don't consider myself and expert on anything. All this has translated over to the survival/preparedness side of things.
As to the winebox oven, I have not yet constructed my own. I would not have thought to use the propane burner idea, but that is ingenius, and gives you more options. If your propane runs out you can still use charcoal. The trashcan turkey oven sounds cool, too.