I havn't tried this but I heard if go hit the tree with the blund of an axe as if you were chopping it, it forces them to come down. I don't know how well this would work for bowhunting. But even just to get them to come to your side of the tree when they are keeping the tree between you and him you can tie a string to a bush and and walk to the other side of the tree and tug the string. This has worked for me a few times before. I think you would rather have them on the ground though. Good luck