Dallas's biggest con is Project A-Kon, with 15-20k people. So....no.
However, ConDFW is an awesome private little con with fantastic writers...because it's run by people from A-Kon & Aggiecon, so they have connections out the whazoo. Bob Aprin & John Steakley are regulars, as are Pat Elrod, and recently, Steven Brust. I've been pushing for Jim for years, I'm glad they finally got the schedules lined up. (Jim's booked til 2057)