Last year I went on the Vista for Christmas and opted for Earliest possible check-in and found it to be such a breeze that next time I want to check in early if I can help it. This year Christmas, we're cruising on Mardi Gras. Is embarkation a quick and smooth process or will it be extremely long wait lines and over an hour to get on the ship? Do you recommend an early check-in time or is later the way to go. The ship leaves port at 4pm, when is the latest to check-in. We're going December 2022.