I am a little more conservitive than most of the others who have posted so far. I prefer to leave at least 100 yards, and 125 or even 150 if it is calm is just dandy for me. I like to set up between a known roost spot, or where I have a bird in a tree and where he has been strutting. I will also set up along a known feeding area or near a water source. The bird will not always fly down to me everytime, but he will always come back around and check me out later in the morning. Patience is the key. Gobblers have excellent directional hearing and a pretty good memory. Soft purrs and clucks "Happy Turkey Noises" if you will, seem to work like magic to bring them in later in the morning.