Toiletries and Medical Supplies:
Although there are preventatives for Malaria, there is as of this time no preventative for Dengue Fever which has shown an increase in many parts of The Philippines this year.
I always bring several Pump Spray bottles of " Off " brand " Deep Woods " insect repellent. This product contains 25% DEET which is the most recommended active ingredient.
I pack this item in my hold luggage ( containers having more than 3 ounces of liquid no longer permitted as carry on with most airlines ) . and I pack each bottle in a doubled Zip Lock type plastic bag in case of leakage which has not happened to me yet.
With any insect repellent, once applied according to directions it does have a time limit for its effectiveness so re-application may be required for full protection in the same 24 hour period.
Malaria carrying mosquitoes are more prevalent in some parts of The Philippines than others. Mosquitoes carrying Dengue Fever however can be anywhere and everywhere at any time of the day or night.
Luggage and bags:
Bring a small luggage when your planning to visit the CAves, Waterfalls and beaches as you will have to find it hard to bring along those big bags with you all the time since the place is quite a scenic one!
Clothing/Shoes/Weather Gear: Bring a pair of sandals and a shoes for hiking along the rough rugged ways!
Toiletries and Medical Supplies: You should bring your own tissue as public toilets dont have a supply to this such!
Photo Equipment: There are many photo rcopying here but if your planning to have a trip in the highlands in here, digi cam would be better.
Camping/Beach/Outdoor Gear: If you like to have a mountain climbing, you can also have a camping gears!