Our baby was 6 months old when we cruised this past January. I thought she was just coming along for the ride. Boy was I wrong! I never dreamed an infant could get so much out of a vacation. It was obvious she had such a great time. She smiled at everyone she met, and she loved meeting the characters. By the end of the trip, many of th CMs, crew, and photographers knew her by name. It was truly magical!
The nursery staff is so wonderful. They do a great job of keeping you in the loop. They will text you to let you know if your baby is fussy, but that is just so you know. It does not mean you have to go get them! Most of the time, shortly after I'd get that text, they'd tell me she was now sound asleep.
As others said, baby wearing is really helpful. She slept in my wrap a lot. We also brought a small umbrella stroller for the ports.
Our servers treated her so well and brought her fresh avacado slices (her favorite!) and puréed food every evening. I also breastfeed, and felt very comfortable feeding her whenever she was hungry, no matter where we were.
On some nights we took her to that evening's show with us and sat on the aisle in case she got fussy and we needed to dart out, but that never happened. She was captivated by the dancing and music.
They offered to put a pack n play in our room but we didn't need it because she just slept with us. We found that she slept very soundly, probably due to the gentle rocking of the boat.
You will have such a wonderful time with your little one! Enjoy!