The pack is an Osprey Ariel 65. It's not the lightest pack but it's comfy. I'll be upgrading to a ULA sooner or later.
The temps were in the 40's at night and I was really warm with the UQ and my 40 degree sleeping bag.
We parked across the street from the park and there were no issues at all with leaving the car. The trip from Pen Mar SOBO to Dahlgren (South Mountain Inn) is 24 miles. We did 9 miles a day and because of an foot injury we skipped the last 6 miles. The first day was really strenuous and we stated at Cowall, the second day was much easier and we stayed at Pine Knob.