Most coaches believe that the team should not watch their next opponent play and I am one of them. If you are staying at a hotel, it's best your players go there immediately following their victory; however, special considerations may dictate otherwise.
Today, high school tournaments are far shorter than in older days; therefore, rest isn't as important as years ago. In this age of basketball, we often see four teams in the semifinals. If your team plays first, most coaches see fit to keep the boys for the second game; however, the mental and spiritual composition of your team should be the controlling factors of your choice.
Today, most teams have video available of all prospective opponents, either acquired or borrowed. However, a coach or scout should remain behind to chart a note any possible changes in the opponent's play or style.