Honestly, I don't think we need polls. We need somebody to "step up" and declare "I am organizing a meet at this place at that time." It doesn't particularly matter whether it's in Dallas, Austin, Houston, or San Antonio. It's no big deal to drive from any of these cities to any of the other ones. I'd probably recommend against going somewhere farther afield (e.g., Brownsville).

Any place that can handle a Corvette club meeting should have no trouble with a bunch of crazy car stereo enthusiasts.