Absolutely correct. I found this sign posted directly in the middle of a parcel of State of Wyoming public land:
View attachment 127124
After passing through public land, the road ended at the private property referred to by the sign. This is why there is no way to close the gate; they cannot legally prevent the public from access. I actually called the guy until he answered, trying to be a courteous hunter. As it turns out, this cost me my chance to fill a tag- there was a group of goats on the WY state land that moved onto private in the hour I was trying to get a hold of him.
Bottom line: private landowners will put signs that say "POSTED NO HUNTING/ TRESPASSING" in the middle of your public land. If you know you're on public, feel free to ignore the hell out of those signs.
Yes, some will but a call to the GW will straighten out any issues you have. Also report to the state land office if you see this happen.
Better make sure the state parcel has not changed hands, been sold off to a private landowner as well.