Used to live in Chester Co. about 20 years ago. It was hard finding places to hunt then and I'm sure it's worse now. When I found a spot though, it was usually a gold mine. Some of the best archery hunting I've ever experienced, pretty much all private land though.
There's a bunch of us about 2 hours north west of you: Monkeyball, Jackdaw, and myself along with several others who are not members here. We shoot with Gary(yewbender) a couple times a year. There will be a couple of Trad shoots that we are involved with in the coming year: North Montour Sportsman's Club in April, MidPenn Sportsman's Club in June, and Shade Mt. Bowmen in Sept. Welcome, and feel free to PM.