We took DS in his PJs, which was just fine. Many kids were still in jammies.
I agree with the previous poster about the experience being painless. They got everyone through very quickly. However, once DS6 was up, he was not going back to sleep! After breakfast, DH caught a nap in the cabin while DS and I played shuffleboard and watched the seaplanes take off and land in the bay (we didn't have a planned shore excursion).
Actually, this turned out to be one of our best days. The Magic was tendered in the bay that day, so we took the shuttle over to the island for a brief visit. Upon return, we had lunch at topsiders, and then returned to the cabin with the intent of changing into our suits.
Rather than swimming, DS konked out on the couch, and DH and I spent several hours sitting on the verandah drinking cocktails. There was a lot to see (sea planes, party boats, the tender shuttle going back and forth). And, of course, we enjoyed some nice adult quiet time. It was just incredible.
DS woke up just as we were pulling out of port. . . . what great memories. Thanks for asking the question and allowing me to re-live that MAGICal day.