The only advice I can give is this: Check out the Western MD Room at the Hagerstown library. I don't know all that it houses, but there is a lot geneological stuff there. Even if there are no family members in MD, John Frye may be able to point you in the right direction for PA resources.
WMR infothe phone is 301-739-3250, but I don't know the extension off the top of my head.