Phil
I suspect the phase you are witnessing is the Toms once on the ground are in strut the whole time following hens. When this happens it gets tough and later day hunts seem to do better.
I sit areas for long waits where I see a few hens consistently along with alot os sign, scat tracks, dust bowls, etc. That has helped my success but it can get boring.
Also if you ever get a hen to talk back at you - concentrate on her as most times if she comes so will any Tom following her!

Another thnig that comes to mind is watch the weather. Temperature drops of even a degree or 2 will help shut them up. However I do seem to do better on cloudy days with a slight temp increase from the day bef


JW