Yes you can book on board! It is treated just like any other excursion. Just keep checking periodically and then again with guest services once you get on board. Have a magical cruise!
Keep in mind that you can also try the simulators for free on the first day before the muster drill. We were offered an opportunity to book a future time then and there, but our "trial" was really enough for us (not that it would be for others; that was just our experience).
sometimes they have competitions like closest to the pin or longest drive on golf. its a fun way to try them out for free or if you cant get a reservation
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