Thanks everyone for the feedback. My wife and I are new to this "RV'ing" stuff, so I didn't even know about things like TACO and rvparkreviews.com.
We're coming from Pennsylvania, with a stop in Memphis to check out Graceland. In SanAntonio, we plan on going to the final four in April. In Fort Worth, we're mostly interested in downtown, and I promised my sister I would take her to a "knitting convention" there (whatever that is). I've also heard a lot of great things about the Stockyards.
I'll be sure to check out all your recommendations.