Fish,
Ive had the same problems like you the last week with a bow. The gobblers are hanging up, not responding to calls, etc. I have left the blind and have started stalking from the first gobble in the morning. I have a perfect area to stalk up on a lone gobbler in a tree. The last two mornings, i have got within 50 yards of lone gobblers and have had them walk within 35 yards of me, but have yet to get them to stop.
Adapting is key right now, and like a few have said on here with the heat they will move to thicker cover which is close to where they fly down.
My strategy for the last 2 mornings is this same idea. After the Thursday morning hunt, i plan on moving the blind into the pines and wait for them to come roost. Since it will be the last time, busting the roost won’t be an issue when i leave 