My best stand was one where deer seldom, regardless of conditions, traveled in back of my stand. My stand was in 30 yd from a field and a trail was in from the stand. When the wind was right and blowing from the trail to my stand, I never got busted. In other stands, yes, deer would find a way to get downwind from me - especially for stands that deer were aware of. Portable ground blinds upwind from a trail are nice in that deer are not aware of them and not casing them out.