Bummer. My dad was a state game warden in KY for 30 years. He spent 75% of his time on private land enforcing hunting and fishing laws. People would hear shots, assume it was hunters and call him.
It's darn near impossible to find anywhere to hunt/shoot here any more. The culture has changed dramatically in the last 30 years. Hunting and shooting used to be common. Every truck you saw had a gun rack, usually with something in it. If you did that now, you'd get pulled over because of some complaint.
Farmers had no problem with shooters on their property, now they don't trust anybody...with good reason.
My guess would be that the spot you speak of has changed hands, either sold off or inherited and the new owners figure you're either militia or cooking meth.