I don't go over board on scent control, although I do try to minimize it to some degree, don't buy into the high dollar scentlok cloths, BUT this is the very reason that I am a skeptic to those that say, "He was directly down wind of me and never smelled me. My Scentlok works!"
When you're up in a tree and you think you know what way the breezeis blowing, do you really know what it's doing 15', 20', or 20 yards from you? Not really!