Rick from Grafton, Va on 8/23/2016 5:09:54 AM:
The short answer is no. The spiral staircase just across from town is doable but tough with a "normal" bike much less a tandem and trailer. You might want to consider getting on the Rt. 340 bridge at Sandy Hook and riding Rt. 340 into town. It's kind of a busy road but doable. Sandy Hook is east of Harpers Ferry and I know the Appalachian Trail use to cross the bridge before they built the walkway your referring to. I guess since there are 2 of you you could haul the trailer up by hand then set the tandem on it's rear wheel and get it up the staircase. Once you get to the footbridge your golden. Rt. 340 is busy lots of fairly high speed traffic including big trucks. Hope this helps.