Taking a 1 year old on a cruise would be great, but I think I would go the Disney route. Back when Disney was the Big Red Boat, we took our two girls. They were 5 & 3. They hardly remember some of it so take lots of pictures. How could a 1 year old not love seeing Disney characters all over the ship. I'd definitely go Disney route for that age. The Summer would be the best because the port stops would be a lot more pleasant for you with a little one. Remember to take that umbrella stroller........!