Since this seems to be the event posting day... For all my Northern Virgina costume peeps:
Sep 15-16 - Mount Vernon 18th-Century Craft Fair - The twelfth annual 18th-Century Craft Fair. Not as big as Fort Frederick but some of the same vendors I understand. Potomac River sightseeing cruises are free-of-charge at Mount Vernon's Wharf. Included in regular admission. I'll probally be there on Sunday (still firming up plans) if anyone wants to meet up.
Nov 3 - Richmond Ball - no website but I can get further details if needed from my dance mistress. English Country Dancing so 18th and early 19th cenutry dress suggested. Hosted by the Richmond dancers, and they are serious about the dancing part! :>
Nov 17 - Fall Ball at Gadsby's Tavern in Alexandria - a 1770s themed ball. $45, reservations required. More info here.
There is also a Jamestown Ball, to celebrate the 400th, on Oct 20th somewhere in the Jamestown area that I just heard about - I can get more details if desired.