I did the Maryland section last year. The reason I went SOBO is because the Appalachian Trail Conservancy is in Harpers Ferry and I wanted to hang out there for a day in time sight see. There's nothing in Penn Mar really except a park where you can leave a car. If you do go from Harpers Ferry to penmar go little bit further and take your picture at the Mason-Dixon line.
Rhonda Adams will shuttle you between Harpers Ferry and Penn Mar. You can look her up on Facebook or I'll be happy to send her phone number in a p.m.
Good luck.
https://photos.app.goo.gl/El1GZBm5TB86RwLm2
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