I did one day in MD from Harpers Ferry to Rt 40A. The section from Crampton Gap shelter to Rocky Run  shelter sucked. Lots of rocks. I was twisting my ankles a lot through here. I still have to do from Rt 40A to Pen Mar. I hear there are rocky sections along the way, so take it slow. I'm planning to do some VA section hiking this fall starting down in Damascus and working my way north. Haven't done Shenandoah yet. Looking forward to that. Shenandoah is closest to where I live in MD, about 2 hours away.