Thanks for the help guys. Basically it seems that handguns are legal on the trail (at least in PA) because they are now legal to CCW in a state park. I believe long guns are still regulated by hunting seasons but please correct me if I'm wrong. Essentially it would be illegal for me to carry an uncased shotgun in the summer unless it coincided with crow season. Unfortunately, I'm probably going to scrap this hike until I'm 21. I really don't want to hike without a firearm, and I definitely don't want to be fined or have my hunting license taken for violating some gun law.