Sun protection,extra paci's/binkies because you never know when those things will sprout legs, go missing and it is a PITA to need a shore stop to try and buy one. A good supply of burp cloths ( Chux pads are great when laundry service isn't there for you 24/7), and remember baby powder and your preferred method of dealing wtih heat rash/diaper rash issues.

Have a great time !