Sorry to hear your boy missed. It definitely gets the adrenaline going.
I don't know why you are not getting any responses other than the toms may be henned up. Also, you did educate a few birds that all that yelps is not feathered. I would try to get out in the evening or before light and try to locate some birds on their roost. Then, get close enough so you can see how they respond to your calling and work from there.
Stalking quiet or henned up turkeys is challenging and can be quite effective, just make sure it is a turkey and not another hunter's decoys. A couple of years ago, I snuck in on some hens yelping, when I spotted the "birds", I could tell they were decoys and just moved off. Those guys were probably bummed that the hen they were talking to moved off.
