My son wanted to stay with my parents rather than the dorms, so I have stayed to watch parts because I have to drive him anyway, but I am certainly not watching all day.
I do actually think that dropping him off and giving him the full experience would be better for him. It would probably help his 7 on 7 experiences as well because he'd have more social time with the coach/counselor and other players. If we do it again next year, we may go that route.