According to my research this is all we need to take with us...(maybe a little more)...
Waterproof sunblock
Two bathing suits
Shoes - flip flops, trashable sneakers, reef shoes, hiking shoes if you need them
Mask, snorkel and fins...although you can rent these
Camera
Junk clothes for biking, hiking, ect.
Light rain jacket
Mosquito repellent, lotions recommended over liquids
Shorts and other cool cotton clothing
Fanny pack
Cheap simple backpack
Hat or cap
You may not need to bring everything on the list but it may cause you to think of things that you hadn't already....
Today's word in Hawaiian is Lomi (low-mee) it means to rub or massage.