OK, well since I started this thread, I guess I'd better provide an update.
I made my hotel reservations for Friday and Saturday night at the Holiday Inn.
I'll head out from Reston some time Thursday morning, over night somewhere Thursday night, then arrive Johnson City (JC) sometime Friday. The details of all of that depend on whether I'm solo or with others. I'm open to suggestions.
If I were doing the trip by myself, I'd head out of Northern VA after a decent b'fast hitting the road about 0900. I'd head west and probably head for Skyline Drive, then work my way to the Blue Ridge Parkway (BRP, which I've only heard about) then head south toward southern VA. Maybe overnight in Roanoke? After a nice night's sleep in a motel 6 or similar and b'fast, continue on BRP and other back roads to JC.
If alone, I might push thru to try to join up with a mid day "friday ride". If with others (or if I have figured out a plan between now and September), I'll ride that plan and hook up with the rest later Friday afternoon/evening.
So, after that, does anyone have any ideas or comments?