We would be coming in on 10/15 around 11:30PM and would not get to hotel until after midnight. Can you send a taxi if we book through Trip Advisor and check in at that time of the early morning?
I'd suggest corresponding directly with the hotel to receive the most reliable answer. With a minimal searching you should be able to get their email address. The hotel staff was good about corresponding with me.
The hotel offers airport pickup for a price. There are also registered taxi services at the airport (taxi green) that are easy to access
I found San Antonio staff very helpful and accommodating. I'm sure that they will be able to accommodate you on both requests. Alternatively, Uber works well in the area. Email the Hotel directly. Good Luck.
Get an answer from Hotel San Antonio Abad staff and past guests.