This is a very complex discussion here. Yes, I go to extremes to minimize my scent levels. Dedicated room for my gear that is ozone treated, with washer and dryer for hunting cloths only. Anything that touches my skin will get washed after the hunt. Using carbon and zeolite powders, etc. Can you eliminate your scent, absolutely not! Can you minimize it to a point where they think the danger is a lot further away than it really is? Absolutely! Yes, since going OCD on scent control, I find myself getting busted once in a while, but not a holy cow and deer blow out bust, but a nose in the air, a slight tail up, then lower and just on a slight edge. They know I am up wind and think I am quite a ways up, not 10 yards away from them. I am now seeing the deer that used to bust me and just simply avoid me and I never knew they were even there before! Scent control will get you closer to deer, even if they still bust you.
Scent control is NOT just buying scent-lok or compareable clothing and going hunting. How you care for your cloths will make more difference than anything. If you plan to wear your cloths in the vehicle, or anywhere, other than; to, at, and back from the stand...don’t even bother buying scent reducing clothing, because it’s not going to work for you.
Do you still need to be conscious of the wind? Absolutely, but.....there are different thinkings on this and I have played with some with success (and failure)...one being threading the needle with the wind, where the deer are coming from and how the terrain carries your scent. Let’s say the deer are coming from the east, use that west/south-west wind and blow almost right where they are coming, but just ever so slightly off of their course.
Another method I use with high scent control is to blow directly at the planned area of deer approaching when I have a neighboring house close, directly up wind of the stand. With my reduction, what they smell of me is faint enough that it seems to them that it is coming from the house that the deer live around every day, very effective.
For the guy that they smelt his tracks....they may not be smelling you, but the ground that you disturbed instead. I had this a year back where a doe was following my tracks in, but suddenly lost the trail when I got to my stepping stones that lead to my stand (I cut logs down to 3” thick and lay them out as a trail to my stand for a silent approach as the leaves do not stay setting on the tops of them) When the ground was no longer disturbed, she had nothing to follow.
As for John, he understands that just because there may be a west wind at his truck, his stand may have an east wind drawing his scent, depending on trees, terrain, water currents, etc. He also knows the heights he hunts affect scent dispersal, so take the “ignore the wind” remark with a grain of salt as he has more thought in it than just that.
Scent control is not for everyone, nor is it as important in areas of lower pressure, but if you put in the effort, it does help.