This one is quite a drive for Dallas folk, but I've heard nothing but good things about it and plan to get up early and head out for the ride. Even includes a Pancake breakfast before the ride!
http://www.tourdecypress.com/index.html
http://www.gmap-pedometer.com/?r=778044
I'll be riding the 45mi route, and I should have one seat open in my truck if anyone wants to split travel costs.