No parking hassles up top. Visitors center is great. They will point you to the trail. Very well maintained and beautiful. And most importantly, ALL DOWNHILL. :-). But it can be steep in places so be a little wary. Takes about an hour down at a leisurely pace. Be sure to stop and read the markers. Once you are walking along the river before you get into harpers ferry, be sure to cross the bridge (turn right, can't miss it) and go onto the island. Great markers with history and you begin to understand the background of this place. The trail will dump you out in the old maintained part of HF. Fantastic. Then at the end of the day, take the shuttle (right where the trail ends) back up to the visitors center and your car. But make sure to eat dinner or at least grab an ice cream before you leave. Lots of great places for that in town!