We have two concierge rooms booked for a summer 2023 DCL cruise, one room for my wife, son and me and one for my FIL and BIL. When we originally booked the rooms we had my wife and my FIL in one room and me, my BIL and son in the other. We did this so that both rooms would get my wife and my Castaway Club status. We subsequently upgraded both rooms to concierge for our 2023 cruise after having a great experience in concierge on our April 2022 cruise. As we don't need our Castaway Club status to book excursions now that we are in concierge, my question is can I swap my wife and BIL's names on our reservations without paying a fee or should we just keep everyone in the same room and switch around key cards on board based on where folks will sleep?