I don't smoke anymore, but used to smoke like a freight train. I always hunted on the ground and usually laying down on a hill side(I'm lazy). I think keeping the smoke low and your movements low is what counts. I don't know how many times I put a cigarette down on a log to shoot a deer. I always wore brown cotton gloves to hide hand movements. If I had to go, I kicked a small hole in the dirt and then covered it up. I remember reading a book about J.A. Hunter, a big game hunter that did guide and contract work for African governments. He was once asked about his smoking in tree stands when trying to kill problem leopards. His reply was "If they can smell the cigarette, they can smell you". After years of trapping, I would agree.