One of my favorite books was an old Charlie Elliott book, title escapes me. A lot of anecdotal "me and Joe" stuff, but the two most practical bits of advice to me were: 1) Use a compass to go to a bird in a tree. Fall off the actual heading by a few degrees, but proceed along the azimuth you shoot towards him. If he stops gobbling or you detour around a tangle and get twisted around, you still have his direction and you can continue to close the distance. If you have fallen off a few degrees from his true bearing, you'll be less likely to bump him if you get too close and he has quieted.
2) If you set up close to him in the tree, make a tree call or two, or a simple cluck, softly. If he answers great. If he shuts up, even better. Resist further calling until he flies down. He has heard you and the likelihood of him calling up another hunter is reduced. Charlie put it this way: "let him sweat and gobble." Some birds will sit in a tree all day waiting for the hen to appear if you continue to call. It's better to wait until he hits the ground before resuming calling. If other hens are calling, all bets are off, especially if they are on the other side of the tree from him and where you sit. In this situation, you are on your own.
