AVL Scarefest is a Halloween-themed RPG conference just outside of Asheville, NC.
Tons of PFS along with D&D, Dread, DCC, Call of Cthulhu, Ghostbusters, and lots more. Large board game section courtesy of Well Played gaming cafe. Heaps of prizes and amazingly nice people.
Creepy clowns and a wandering Yeti are standard. On-site lodging and food so you never have to leave!