In scent, it's all about where you are.
The smell of smoke in an area where they usually is none or in an area near campfires and woodstoves. It all depends.

"Scent free" products are a joke. You are NOT invisible to that deer scentwise. Want to test it. Havesomeone with a good tracking dog "hunt" you while you are wearing your products. You WILL be found.

It's more about not using un-natural scents while in the woods. No "moden" products.But unless you "scent free" everything,your cam-oil/gun-oil, the plastic, all the other equipment, keep the bacteria from growing on and inyour body, don't produce any sweat or oils in your skin, don't breath, and so on, you will make scent that something like a deer will detect. The only difference might be that the deer will smell you when it's150 yards away instead of 1000.

My brother is about as scent free as a biker bar at 1am on free-chili day, and he has not just seen the 2nd year bucks, but had more than his share of "old-man monster bucks" cross his sights and even stroll right past him while on stand. It's just that he moves about as much as if her were made of stone. NO movement, no sound, no problem.

And for that matter, I've had more than a few times where I've had older (seeexperienced)bucks withing yards (3,4,5) of me while I was wearing bluejeans and "fartin' Yanky Doddle" while sitting on the gound. It'sjust that I hid my face, or more exactly my eyes, and kept still.