Chambersburg, Pa

An acquaintance from elsewhere on the Inter Webs likes Hempen Hill BBQ in Hagerstown, MD. Not sure how much of a drive it is but if you're going to be there for 10 days maybe you'll get a chance to check it out.

I am about an hour North east of there. I wish I could recommend something down that way, but I don;t get down there much unless I am passing through to Virginia.
Up in our area, my friends say Shakedown BBQ in Grantville is great. I haven't been there though/

FYI: Hagerstown is about a half hour jaunt down I-81 froom there.

Tish is in York, and I am about 2 hours away - don't know squat about Chambersburg, but you aren't that far from Gettysburg - cool stuff to do there.