Please let me know what type of travel documentation you will be using for your trip.
Please note that if you are going on a cruise and passports are not required when traveling on a cruise that begins and ends in the same US port, we strongly recommend that all of our customers travel with a valid passport. This is because should you need to fly back to the U.S. unexpectedly during your trip due to a medical, family, personal or business emergency you will be required to have a valid passport.
According to the law U.S. citizens on cruises that begin and end in the same U.S. port and travel to destinations in Mexico, Canada, the Caribbean, the Bahamas, or Bermuda are able to re-enter the U.S. with proof of citizenship other than a passport or passport card. Acceptable proof of citizenship includes an original or certified copy of your birth certificate and a government-issued photo ID (such as a driver's license).
Passports are required for cruises that begin in one U.S. port and end in another.
Children under the age of 16 who are citizens of the U.S. or Canada are exempt from the passport requirement for land and sea border crossings.In lieu of a passport, children are able to use a birth certificate as proof of citizenship for entry into the U.S. by land or by sea. Children entering or re-entering the U.S. by air are required to have a valid passport.
There is a lower-cost alternative to the passport, called a passport card, which is acceptable for entries into the U.S. by land or sea, but since the passport card is not acceptable for air travel it is better to invest in a passport.