For what it’s worth, we did not attend those kind of events when we were looking at schools with my oldest child (just not really on our radar, I guess). Last year, as a current student at a boarding school, he attended one of those events and spoke on a panel with some other students, just answering questions about what it’s like to be a student at that school. When I thanked him afterwards for being willing to give up an afternoon to do that, he told me he really enjoyed it, that the prospective students asked really good questions, and he wished he’d attended an event like that when he was applying to schools as it would have helped him figure out he wanted to go to that school long before he got to revisit day.