We heard from other kama'aina passengers that there was no line a little later in the afternoon. A photo ID is required. They'll imprint a credit card and provide a boarding pass that also serves as an onboard charge card. Wallets can be locked up and ignored while on board, one benefit of traveling by cruise. All cabins are not created equal.
Most cabins have twin beds, but some queen-size beds are available.
We were on the promenade deck, which we loved. Two big windows looked right out onto the deck and the ocean beyond. We had to close the curtains to ensure privacy but we liked our location, anyway. The bathroom had a large medicine cabinet and a big, deep bathtub. The TV didn't receive much, and what it received was fuzzy.