Hello, from southern York County!
That same bug bit us this year too. In PA we camped at Raystown Lake, Granite Hill Gettysburg, and a nice little place in Newville called Dogwood Acres. All very good experiences.
I found this forum to be the best source of info, tips, tricks and even laughs from folks who have been there/done that!
2005 GMC 2500HD Duramax
2006 Wildwood 27BHSS