Addressing the confusion about the San Antonio tickets:
I called the box office and they said that Tobin Center Member early access tickets are what opened today. General public access to Libera tickets for San Antonio will be, as the website indicates, on Friday.
If you are SUPER hardcore about getting the exact spot you want, year-long membership for the Tobin Center costs $150, and the orchestra center tickets are $37.50, I believe. Paying for this membership will allow you to buy tickets before Friday. I will be extremely honest and admit that I - perhaps pathetically - took this route for the spot I wanted. I did this all over the phone with the Tobin Center box office and it took about 10 minutes. You can think I'm ridiculous; I'll own it.
If you haven't seen it yet, here is the seating chart for the Tobin Center. I was told that the first two rows closest to the stage will not be accessible for audience members, as requested by Libera:
https://www.tobincenter.org/sites/defau ... hestra.pdf
EDIT: Tickets are $42.00 for orchestra center. (36.50 for admission + 5.50 for additional fees)