You will need sturdy walking shoes or hiking boots. Several layers for the night safari.
Cool cotton clothing for the jungle tour. Swimwear if you plan to enjoy the waterfalls or pool.
Toiletries and Medical Supplies: Shopping is limited to a small convenience type store nearby. Take what you will need.
Photo Equipment: Take plenty of memory and batteries.
Miscellaneous: Don't forget the sunscreen and a light.
Hiking boots would be good although I hiked in flip-flops. A light rain jacket could be useful so you don't get soaked like I did!! It can rain alot here!!
Toiletries and Medical Supplies: Anti-Leech lotion...I don't know the brand though....sorry! But the kind we had worked well after we put it on!! Rub it all over any exposed areas on your legs or actually you can buy anti-leech leggings at the park headquarters.
Photo Equipment: Bring tons of film or have plenty of space on your digital camera memory card. A good zoom lense would also be very useful! Especially if you're watching animals from a viewing station! A wide angle lense will be good for taking panoramic shots and shots of some of the waterfalls. You won't be very close to them.
Camping/Beach/Outdoor Gear: Swim trunks or quick drying hiking shorts would be useful if you want to swim at any of the water falls.