I'm guessing that USC's Summer workout schedule is similar to UT's - a couple of days off during week (probably over the weekend).
If Smith actually wants to weigh other options under the radar while retaining his present opportunity at USC, I suspect that is when he would visit. I would expect him to maintain his normal schedule to keep up appearances until then. And as has been mentioned, we would learn of any decisions in our favor after his bags are packed for the move.
Though there are no indications that he is coming to UT, the rumors and Jackson transfer give me reason to wonder if something may yet happen.