like Bowman said above, GROUNDHOGS are the ticket to a lot of hunting... among other places, I had all but one farm tied up north of Schafferstown between 501 and 491 all the way up to Reistville road... got in and started shooting hogs for a couple of places and after the word got around had people stop along the road when they'd see my car or partners truck and come out to ask if we could shoot pigs for them... had places tell me we could shoot gh's but no deer hunting... till fall rolled around we had all of those places to hunt fox at night plus a bunch more would have let us in for deer...
be respectful, dress decent, have equipment available to show the land owners if they need a little more convincing... we had one place that was leery of letting us in to shoot groundhogs, because of the loud report of centerfire rifles around his dairy herd, but when I told him we mostly shot 22 Hornets that turned him around and it turned out to be one of our better spots for everything... I believe what I told him was, "we shot hornets to keep from scaring the women folk and upsetting the laying hens"... a small bag of penny candy for the kids once in a while, a $2.00 bouquet of flowers for the haus frau works wonders...
we had business cards made up that I gave to anyone I talked to, even if they didn't need our services, in case a neighbor needed help they could pass the info on... I also had a one page letter that had our names, addresses, phone numbers and a bit of info about us, years experience hunting, membership in clubs {NRA, PPHA, etc} and a listing of hunter safety courses etc that we'd attended... this was given to all the people that gave us permission to hunt, it gave them a solid reference to us if they needed to contact us about anything...
hope some of these pointers will help y'all get more properties to hunt... I just wish we had groundhogs down here in coastal Carolina, but the soils way to sandy, they can tunnel in...