If you wait until the last minute to book travel, you might get lucky and get a really cheap rate, but it is a gamble. Most Caribbean ships were booked solid last winter. The ship for last year's Interrace cruise was full. Plus, the Caribbean and San Juan are popular travel destinations. Peak travel season for the Caribbean starts about the third week in January through Spring Break.
Carnival cruises are also very popular.
An experienced travel agent is a big help. Cabins vary in size and amenities. All cabins have private bathrooms with a shower, twin beds that can be converted to a king sized bed, a color television, a safe, and closets. You may want additional luxuries, such as a bathtub, hair dryers, bath robes, and mini-refrigerators. Suites generally offer the most room.