In the warm months, bring T-shirts, shorts and lightweight clothing. In the cooler months, the Caribbean evening temps dip into the upper 60s to lower 70s, so bring light jackets and pants. For all months, bring at least three swimsuits. Bring plenty of shoes for different locations. To tour cities at port calls, you might want to wear tennis shoes, while at the beach and the ship's pool, you might want to wear sandals.
While on the ship, you will not need cash. But for port calls, having cash and a credit card is important. U.S. currency and major credit cards are accepted almost everywhere. To board the ship, you must bring one of the following documents, according to the official Disney Cruise site: "Valid, unexpired U.S. passport. Original state issued birth certificate; additionally, guests 18 years of age and older must present a photo ID issued by a local, state or federal government agency. Original Certificate of Naturalization; additionally, guests 18 years of age and older must present a photo ID issued by a local, state or federal government agency. Original Certificate of Citizenship; additionally, guests 18 years of age and older must present a photo ID issued by a local, state or federal government agency. Original Consular Report of Birth Abroad of U.S. Citizen; additionally, guests 18 years of age and older must present a photo ID issued by a local, state or federal government agency." You must bring your signed form you printed when you checked in online.
Bring a collapsible cooler to hold beverages when you go to the pool or to the beach. Bring a camera. Depending on your hair and skin regimen, bring toiletries including shampoo, conditioner and face wash, unless you want to buy them while traveling. Bring sun protection including several bottles of sunscreen, extra hats and sunglasses.