Several of us just did the Cumberland to DC part week before last, and two of us stayed in motels/B&B's. I'd be happy to pm you the places we stayed and phone numbers, etc. We had three days that were 40-45 miles, one that was about 35, and one that was about 25. (It's either that or camp or have a 60 mile day from Leesburg, VA to DC.)
DebW's done the Pittsburgh to Cumberland part, but she's a camper.
You'll have a great time!
You've probably seen the threads, but if not, they're here and here.