Next morning:  It started raining around dawn, and now, an hour later, it's been coming down hard for a while now.  I'm so glad I made it to this shelter last night rather than camping out.  Otherwise, my food would be inaccessible hanging in a tree, and even getting out of the tent to take a leak would be impossible without getting soaked by rain.  Since I'm obviously not going to get an early start today, I may go back to my original plan to spend the night in the town of Franklin.  Last evening when the skies were as clear as they'd been all day, I thought maybe I'd just resupply food there and then hitch back to the Trail.  The road is only about a 4 mile walk downhill from here.  The noise from the rain on the metal roof is so loud it almost drowns out the rumbles of thunder.  I may hike out of here in the rain, but I'll wait until the electrical stuff is over before I leave.