Well, if he were going, I'd visit Harper's Ferry just to look over the terrain, the town is a bit touristy but not a bad visit.
And depending how much time was available and how far afield, a trip to the Bull Run battlefield which gives you two battles in one.
Don't know much more than that - on my trip to that side of the continent with wife in tow we headed further west into the state to visit an arboretum and then more scenic drives before heading towards either Monticello or Appomattox, been nearly 20 years now - I know we visited both.