Given that you will be getting acclimatized to very humid, and hot weather, it would be a good idea to pack plenty of sunscreen and adequate sun protection in the form of wide-brimmed hats and rash guards. Other must-pack item includes plenty of insect and mosquito repellents. If you are travelling with kids it would be a good idea to take along plenty of mosquito patches, which will come in handy, especially during the evenings. Apart from these items, a small flashlight for hiking, a reusable water bottle will come in use. While you are at it, choose to bring along a small lightweight backpack apart from your luggage to use for the daily excursions.