Trout or Warmwater? For trout, I'd head up to Beaver's Bend state park near Broken Bow, OK; about 2 1/2 to 3 hrs from Dallas. It'll be crowded on the weekend, but it's still a nice place to fish.
For Warmwater, I'd look at the sand bass threads on this forum for locations and I'd go fishing for white bass while they're still running in the creeks.
If you can find some sort of boat the Dallas club has a fishing event on Lake Athens this weekend, but that's a difficult place to fish while wading.
Fly Fishers International certified casting instructor