No vaccines are required for these ports however our physician suggest that we keep track of our tetanus booster (last 10 years) because of our travels. Also your state issued identification and passport should be enough. FYI I've had those travel nightmares many, many times so I totally understand your paranoia. Have a great time!!!!
Don't forget your credit card or cash for your on-board account...or you WON'T get on board...lol!
Let the party begin!!!!