I'm updating the 2007 ALDHA Companion for the Tanyard Gap to Erwin section and new to the book (last year) this place looks extremely nice, only .5 off the trail (Log cabin Drive) 17 miles north of Hot Springs and 1.6 miles north of Allen Gap.
Besides having heated cabins and bunkhouse and a covered tentsite by a creek, they carry all types of fuel, serve hot food, carry "backpacker" meals and other items in a small store at decent prices. They also take credit/debit cards.
Open year round, Hattie seemed genuinely pleased to accommodate hikers. you can email or call her if you have any questions....
http://www.hemlockhollow.net/hikerspage.html