Been there done that a few times and I was more than good on both of those things. Maybe because I heard there wasn't much to do but see The Alamo and walk up and down the Riverwalk.
So if San Antonio is that close to Houston and the drive was easy as I claimed, then why hadn't I spent more time in San Antonio? It's probably one of the easiest drives since you can just hop on I-10 and head west until you hit the city. I'm ashamed to admit that I lived in Houston for 18 years and only visited San Antonio a handful of times. A Reluctant Tale: How I Came to Love San Antonio