Sounds like a winnah to me... keep me posted on plans.
An all-night pub-crawl on the Riverwalk in San Antone is do-able -- and most of the major hotels (with frequent stay clubs) such as Hyatt, Hilton and Marriott are right on the Riverwalk.
The Astrodome and/or Texas Stadium or the Bawl-park in Arlington sounds like a good idea too!