Update: Joe points out that we need to be there by 7pm; that 8pm is too late. Update#2: removed the RSVP filter - anyone can come even at last minute.
Sunset is at 7:55pm so try to meet at the parking lot no later than 7:00pm. There's lots of good shots to be had starting about an hour before sunset and of course after sunset. I (Joe) will be set up and ready to shoot by 7:00. If anyone wants to hike up to the tower, you'd want to be there by 6:30 pm. Lots of room to park in the lot & spread out, lots of wildflowers and other sights to photograph along with sunset. Plus if you want to try some star photography, you'll already be there.
Weather & cloud cover are key to success and aren't predictable. Heavy clouds or rain will cancel so we'll call it Thursday night.
Note: It takes 2.5 hours driving from Knoxville - going through Maryville/Townsend is faster than going through Pigeon Forge/Sevierville.