Castaway Cay Cabana #22 Paperwork Cabanas are available for all guests but are very limited. Concierge and Platinum guests generally get first crack at them. On the larger ships they disappear fast. On the smaller ships, not so fast but they do get filled most of the time. As a concierge guest, they hold/reserve a few cabanas just for those in Concierge. If you sail concierge and book early enough, you are fairly certain to have access to them. This cabana was reserved when we booked the cruise about 2 months before embarkation day.