You can't take any liquids over 100mls. So I suggest that when doing your packing just put all your toiletries etc in zip lock bags and put in your cargo luggage. Make sure your nail clippers etc go in there too. Mosquites have never bothered me, but if you're one of those people that they love to eat bring your DEET. Bring your reef shoes/wetsuits if you're into that. Immodium if you have a sensitive stomach. Avoid tap water and you should be right. If you run out or forget, go to the Apotek and get some. If they don't have, ask for charcoal tablets.