School was pretty much ok with it. The jr high was not an issue. The older two were sophomores at the time. They are good students (one will most likely be valedictorian), well behaved, teachers like them. They were able to exempt most exams. One had to take one test when she got back, the other (thru a mistake by her teacher) got to take the final before they left. It helps that dh plays golf with the principal (small town!)
I don't know about the teen clubs. We have no sea days, which was what we wanted, so they won't need to be entertained during the day. My older two didn't love Vibe to begin with (they are some to lots introverted, not into social media, and love to talk world politics, etc, so not your usual teens.) My younger teen liked Edge only for gaga ball and beating everyone else at video games. Youngest ds, age 10, did not love his club either. I'm hoping he likes MSC's for evening activities on some nights.
I'll post a good trip report when we get back. The cost difference was astounding, and we will be sailing in their Yacht Club, with a butler, private dining room, lounge, and pool area. If we'd gone the non-concierge route, it would have been dirt cheap compared to
DCL, like maybe 1/10th the cost.