Excellent summary, Deb! The only thing I would add is our daily mileage:

Day 1 Cumberland to Little Orleans, MD 43.7 miles
Day 2 Little Orleans to Williamsport, MD 41.4 miles
Day 3 Williamsport to Harper's Ferry, WV, 38.7 miles
Day 4 Harper's Ferry to Leesburg, VA 25.2 miles
Day 5 Leesburg to Georgetown, DC 35.5 miles

Plus a few extra here and there to get to motels and look around a bit.