I think you're over thinking the whole issue. If you take food and other drinks that deer and other critters can certainly smell, why not coffee? Sheesh.
The old timers washed with Ivory soap, put on clean laundered clothes, and went out with a thermos, and packed lunch, and they killed a lot of deer.
Far too much hype about ridiculous things these days, IMHO. You don't need scent killers and ghillie suits and camo and all that junk. You do need to know how to move through the woods quietly, or sit quietly if that's your choce.