We are planning to car camp at Dockery but also want to hike up to Blood Mtn shelter and we are not up for 8.5 miles uphill in one trek - which is the distance from Dockery. We might get up after the night at Dockery and drive up to SR60 where it crosses the AT. How far a drive is that? Is there parking? What's the trail distance from the SR60 crossing to the summit of Blood Mtn?