I see you have a TC, my wife and I went for 18 days on the BRPW Sep of 2011 in our TC, we done the entire length from north to south including Shenandoah N.P., We never ran the onboard 12v down and never used a geny, we showered every night and pulled over at several overlooks and had lunch with a view, It was wonderful, The CG's on the PW are so beautiful I would say stay at one of those at least every other night, then one with hook-ups if you need to, we stayed at every single CG on the parkway and each one had it's own beauty, it would be ashamed to miss out on that, and I mite add in our 27 years of camping and traveling it was our most relaxing trip of all, we hiked every chance we could and some days we only traveled a few miles to the next CG, those days were spent exploring the area, the only CG we stayed at where we had hook-ups was Sherando Lake CG, very well manicured and nice.
We are very much looking forward to doing the trip again, We started on the labor day weekend with reservations and went the rest of the trip without, some nights we were the only ones in the camp ground, that was bliss, as we are quiet freaks.
Dar