Arlington is doable, and in fact I'll be in Arlington on the 21st. I may just head there and spend the night with my friends, then have a short drive to the car show on the 22nd. Do you have more information on this show?

I also ran across this group, but haven't met up with them yet.
http://www.dapa.org/

Found some shows here in Garland on Saturday, with GoodGuys going on maybe a few trophies at the local shows will be easy pickin's.