I am scent freak, so I have never brought coffee in my stand. ALthough, my father always does gun hunting, and it never seems to bother him all that much.
One thing I would never think about doing is smoking in a stand...altough every year I hear a story.." I just lit up a cigarette and..." it makes me VERY mad I am so meticulous with my scent, and some people get away with a hunting sin!