I have a secret weapon for locating gobblers in the roost at sunset, or as I like to term it, putting them to bed. About every 500 yds. or so I let out a loud howl, it will shock gobble them. I don't use the howl, or any other shock gobble method until I've attempted to get a gobble with a turkey call, usually a gobble call works best at this time of day for a first attempt. Once you have the gobbler located, come back in the dark of morning and get set up 50-75 yds, from the roost and call them in when it gets light.
Once it's light out I will simulate a wing beat against my pant legs, then follow up with what I call a tree call. The tree call is a barely audible purr that I only do once or twice within the first couple minutes of the wing beat. If they haven't flown down yet, I follow up with some scratching in the leaves, then a real soft putt. Nothing fancy is needed, KEE, KEE Runs and all those other fancy and intense calling technique's are unnecessary, turkeys are as dumb as a box of rocks. More often than not, the gobbler will fly down right in front of me with the first tree call, "boom" turkey hunt is finished!
GS