When I'm hunting I always have milk weed with me that I use to check the wind direction with. I hate the powdered stuff people buy or a feather on a bow to tell the direction of the wind. When I use milk weed it drifts around and tells me what its doing away from me. I can get a pretty good idea of the main wind that way. Many times I'll let the fuzz go and 20 minutes later it will be coming back at me. Sometimes its a no win situation when trying to hunt the wind but at least a person can get an idea on what the dominant wind is that day. When your hunting creeks, hilly land, etc your wind will do many different things that its not generally suppose to do, kind of like hunting in the mountains with it going in every direction.