Luggage and bags:
A small bag should suffice for your change of fresh clothes and toiletries.
Clothing/Shoes/Weather Gear: Pack a long-sleeved t-shirt and long pants (in case the mosquitoes bite during the fireflies tour!)
Toiletries and Medical Supplies: If you stay at the Firefly Park Resort, bring along an extra towel, soap (coz they only give for 2 persons), toothbrush, toothpaste and all your other personal needs. Oh,yeah! Insect repellent is also a good idea to bring (for the fireflies tour).... If you forget to bring one, they sell natural insect repellent at the souvenir shop!
Photo Equipment: If you want to take pictures of the fireflies, make sure your camera has night vision mode (is there one?) Flashlights are not allowed as this will disturb the fireflies activity at night.
Camping/Beach/Outdoor Gear: Comfortable walking shoes/slippers is a good idea to bring.
Toiletries and Medical Supplies:
Insect Repellant is a must if you visit the nature park. For fireflies site, insect repellant is not necessary unless you are very sensitive to mosquito bite.
Usually if on windy night, there is not much mosquitoes.