I came back from the Philippines February this year and they did not charge me the departure tax.
I don't know if it is only during particular seasons or if it was canceled, but I just wanted to share that. (enjoy your trip, I really wish that I knew about it earlier, I would have loved to join)
Another thing that might be useful, the resort I was in was using Type A electrical plugs
you can use the following lists for travelling abroad in the future.
World Standards Plug Types
World Standards Plugs, Socket and Voltage By Country
Wikipedia - Mains Electricity By Country
Good luck and stay safe.