I'd have to say the more he calls the less I do. If he's answering me, I might let him gobble a half dozen times before I call again. If he's trying to locate me, I'll give him just enough information to let him know he's on the right track. And they don't need much. If he hangs up, or has hens, I'll cutt or call more aggresively.
I've already called a tom in with a total of one cluck.
The only unattended hens I've heard making a lot of noise in the woods, were ones heading straight for the toms.