Whether you decide to visit the tanning booth or not before you go, make sure you still use at least a 30 spf sunscreen, and reapply it often. Especially after you go into the water, or if you perspire, make sure you reapply the sunscreen. I would also avoid being on the beach between 11:00 am and 1:00 pm, when the sun's rays are the strongest. A gradual exposure is much better than a long time when you first arrive on the Island. A beach umbrella is a good idea, but beware that you can still get some sun exposure there too. Apparently reflection off the sand and water will give you a dose of sun, and you won't realize you got "too much" sun until you are already red.