Thinking ahead to the fall deer/elk season, has anyone tried a small heater in a ground blind with success? Awhile back, someone mentioned using a Sterno canister. This sounds like the amount of heat would be about right for something as small as a Double Bull or ASAT, but I also wonder if there is any odor that might come off of this heat source - or any other catalytic type heat source - that would spook game. Thanks. Roskoe