Luggage and bags:
The lighter the better. You will have to carry it on your bike unless you get a ride on the ox cart.
Clothing/Shoes/Weather Gear: Bring plenty of shorts, t-shirts, and your swimming suit/trunks. Some comfy walking shoes and a pair of flipflops.
Everyone dresses verey casual here.
If you are staying at one of the upper end resorts you may need something a little nicer.
Toiletries and Medical Supplies: Bring all the tolietries that you cannot do without for a few days. Bring the medical supplies that you need also.
Photo Equipment: Bring plenty of memory sticks or film, batteries, & a sun filter.
You may find some film for sale here on the island but it will be expensive.
Miscellaneous: Don't forget the sunblock.