I am more concerned about the after-weekend side. I always make DD take 2 full days off from pitching or pitching drills after a long weekend tourney. Let the body rebuild before easing back into it.
On Friday before, maybe some light work but I wouldn't overdo it. It's not like she's going to get better the day before a tournament, but a little muscle memory reminder is good as well as doing mental prep and building confidence.
no credentials here, FWIW