I have the same problem. I hunt in a river bottom that is heavily wooded. The wind constantly swirls. If it's blowing one direction where I am, I have no clue what direction it is blowing 50 yds down wind of me. It makes it extremely difficult to see good bucks because they can show up from anywhere at anytime. Every now and again the wind blows a constant direction, but not often enough. Those are the days I always hope for.