@treschicos but UT is not good for merit, especially out of state, right? We need to keep costs down. S has seen a big public university (UBC) and loved everything about it, so we know the big schools that make sense financially will be on his list.
S may do another TX trip at some point, probably with H, to see SMU, TCU, and maybe Austin College, if S is okay with LACs.
Yeah, our house is pretty unpredictable. Five teens, three of whom were adopted internationally fairly recently. All sorts of issues at play here. 
Don’t know which one to put first, but I can definitely say that if there’s a school you want to eliminate, put it last on a multi-college trip. College trip burnout happens and when it does, the hate flows like water.
Here’s a follow-up, to close the loop.
S20, D18 and I took a full week to drive through TX. My plan was to tour Southwestern and Trinity with a drive-by of Austin College, but the kids requested to see more. (“We’re driving right by it!”) We ended up doing a full tour of Rice (for D18) and walk-throughs at UT Austin and Baylor. We had two full days at Schlitterbahn and a play day in downtown San Antonio to break it up. It worked beautifully and the three of us had a great time together. The three schools we formally toured had vastly different personalities, and the others we walked through gave S a good sense of the huge variety that’s out there.
As I’d suspected, Trinity came away the big winner; not just with S20, but with D18 (“NO Texas, NO LACs”) as well! She has eagerly added it to her apply list. I think the play day in San Antonio helped sell it. They both loved the city. So now S is happily listing all of the schools he wants to eventually visit, asking about specific majors, and having D help him with test prep. He’s fired up! Thanks for all of the help. :x