RE: smoke as a cover scent?
It works if smoke is common to the area. It doesn't work if your stinking up the clothes or gear at the same time by wearing them. I often hang clothes and gear in the same room as my wood boiler, never my scent lok gear. It comes out of the dryer hot and instantly in a seal bag. I never wear my clothes unless I'm hunting and remove all scent lok if I'm not, even to field dress. Smoke works in the multiple areas I hunt in. If I had no way to clean gear I'd hang them in smoke and wear them.
With the price of heating wood smoke will be every where again.