How big of an area are you hunting? I know this advice is a little outdated but you can file it back for later use.

If you have a good vantage point to hear from here is what I would try. When you get to your spot run a call softly right after stepping out of your truck. If nothing answers turn the volume up some. If you are satisfied that nothing is within earshot of the truck you walk to your vantage point. If it is a little bit of a walk stop every now and then and do some soft calling. When you get to you vantage point give some soft clucks. If nothing answers after a few tries then crank it up a little with a long series of yelps...about 10-12. Get a little bit louder every few minutes. If still nothing do a short cutting sequence. Keep it brief. If still nothing, really hammer down one good time.

If you haven't gotten a reply by now he either isn't interested or isn't there. Where I hunt we use this method a lot to locate birds. We hunt near a lot of clear cut that the birds love to hang out in. You can't just sneak around in clear cut so you have to get the bird to tell you where he is out in it. Mostly we have hardwood bottoms and draws that extend into the cutover. We usually are long distances off throwing calls into these bottoms. My brother has more success than I do with it because he doesn't hunt every bird he hears. He makes Tom answer a call 2-3 times before he chases him. I go after every gobbler I hear.

Crow calls work sometimes. I sat within 20 yards of a very vocal hen this year and watched he go dead quite when someone blew a crow call a couple hundred yards away. Until she heard that crow call she was clucking and purring like crazy. It took her 15-20 minutes before she started clucking at my calls again.