We are also going on that Princess cruise itinerary. We got the following vaccines, although it may have been more than needed. I expect to travel further in Southeast Asia, so we had all the shots to cover that as well.

We got a tetanus shot, which is recommended for international travel if you haven't had one in the past 5 years. As well, we got Hepatitis A and Hepatitis B shots. Each is a series of 2-3 shots. And we took Typhoid oral doses (4 in all, taken at specific intervals for a week).

Also, it was recommended that you a product containing 20-30% DEET on your skin for the South part of Asia. I plan to use it in Vietnam, Thailand and Singaporem, and purchased the OFF packets for the trip. .

You can find some information on the CDC web site for the countries you plan to visit.