Maraudercon November 10, 2012 - Baltimore MD

[proditor]

Link: http://maraudercon.org/

This one is actually in my neck of the woods, and I'm thinking of entering a flying battleship or two in the Sci-fi section. 

General entry seems cheap at 6 bucks, and the $12 entry fee to the competitions gets you a "SWMBO gets in free" pass.