RE: To post or not in PA
Posting is probably your only alternative and the advice about using signs that say Hunting By Permission Only, sounds like a good way to handle it, for starters. Those with any class will ask first, the rest will do what they want to anyway. You'll eventually figure out which ones are which.
I finally started posting my ground along the road frontage, when road hunters fired a volley that came within 50 yards of a stand I was in, back in one of our last doe seasons. None of my otherboundaries are posted, since I have permission to hunt on neighboring land. All of my neighbors in the area know the posters are not for them, some still make a point of asking anyway.
Inyour situation, boundaries with state land will probably also need posted, if people have become used to straying onto what is nowyours. It will tick people off, but they'll have to adjust to things. It ain't their land. Also good advice about making sure where the actual lines are so posters are correctly placed.
Establishing good relations withneighbors is always a positive, especially when you live someplace else. They're always there, you aren't. Fortunately for me, I have relatives in the area of my cabinand have known most of my neighbors since I was a kid.
Sad that posting may be your only solution, but there is no shortage of people more than willing to take advantage of things and basically become a major PITA. You ownit, you pay the taxes, it's your decision that matters, not the opinions of those that think they can abuse your investment. Best of luck.