I know how you feel.
I called and chased a bird today all friggin day. I was on WMA land, he was on private land the whole time. He had hens at least part of the time and would gobble but not commit. One point he was so close his gobble was like thunder... He was behind a fence/shrub row just out of sight and wouldn't come in. Got busted by one of his hens but he had at least one more who yelped at me but didn't come to check me out. There were gaps in the fence they could have crossed. But the cows came in and the birds went away. Not that the cows scared them, I just heard as each gobble got farther away and cows took the place of the birds. But... I'm not giving up my season yet.