So, I just got off the phone with Curt at Standing Bear. He made the sensible suggestion that parking my truck at the hostel is no problem, but it would be easier if I hiked from Springer to my truck rather than other way around.
Curt said he could shuttle to Springer, but other options may be easier.
I know it is a long shot, but I figure with AT thru-hiking season gearing up it may work: Anyone heading from around the Smokies heading down to Amicalola?