I' m curious. How big a timber patch is it? Is there ajoining pasture, grain, or hay fields that bump up to it that you have permission for? If so, I love setting up just off the timber edge, and putting decoys out in the open fields. The other hunters there are a concern with that tactic. 100 yards from roosting birds is plenty close enough. Don' t worry about the exact roosting tree. If it' s a smaller patch I' d really try to find out who else is in there and talk to them before you hunt.