I am thinking of taking the 4 night cruise next Dec. 19 20004. I am afraid that it will be too cold outside. But Disney World will be busy that time of year. Has anyone been on a cruise in late Dec? Is it warm enough to swim? This will be our first cruise, but I had a friend who went on the 3 night in early Dec. 2 yrs ago and she said that it was great! Thanks for any help!!