Sounds like some of you need to get out there ASAP!
I have found that if I miss them early, when they are hot and come running to any old squeaky hen call, I can still have good success late in the season.
It's a little more like deer hunting though. You have to be in a travel corridor, between feeding and roosting areas. It also involves long sits in sometimes hot blinds. If a bird does come along they seem to jump at the last chance for a girlfriend.
I have actually killed more GOOD birds later, than earlier in the season. Once all the hens have started sitting nests through-out the day, those Toms start awandering.
OkKeith