RE: Deer hunting and Tobacco
I did some experimenting last season with cigarettes, smoke, and butts.
I purposely lit up while deer were present and purposely blew smoke (with the wind) in their general direction.
I don't believe I was scented - likely due to smoke rising.
I don't believe I was seen blowing smoke, although I agree that it is very possible.
(I say "I don't believe" because I did not witness a reaction although who knows what exactly the deer scented/saw, both those I saw and those I didn't.)
None of the deer appeared spooked until they came across a cigarette butt I left on the ground after putting the smoke out.
Every deer that came within 5 feet of the cigarette butt nearly turned inside out trying to get away from it!
So I say - If you have to smoke - do so sparingly and never throw your butts down. Just my opinion.