Do not bring too much baggage.
  1. 3 swimsuits is enough to bring
  2. Shorts but not short pants
  3. 2 pairs of slippers would be fine (flip flops)
  4. Don't forget to bring a first aid kit
  5. Medicines - headache, dizziness, and for too much alcohol

Some other tips to consider:

Eat on time and sleep at least 6 to 7 hours.

It's much nicer to swim in the morning, when it is much more peaceful.

It's nice to take a nap around 1 to 3pm for you to prepare your nightlife escapade.

Try to experience island hopping.