PA you have a chance anywhere you want really. Swamps are usually good but mountains are also productive. The main thing about bear hunting is that you need a nice group of people that also are bear hunting. after the first couple of hours of sitting all you should do is organized drives to push a bear around.
NOW, If you know where a bear is because of pre scouting tactics or just been seeing one around, Go there and wait it out for 1 day.
Don't forget, you may see a bear in one spot one night and the next morning you'll hear about it being shot 40 miles away.
I could give you more information but i'm getting ready to go out with the bow in the pouring rain