I have done it many times but that was a couple years ago. It cost 400p a night (I think if I remember right) and does not require any documentation. It is safe and the car is parked in the lot closest to the arrival doors.

 

What he said, just do not park under any of the trees

 

I recently asked this at the gate. Cannot recall the exact price, but sure it was something like P185, not P400. There's two variables here: 1. My memory. 2. Could have been a guard just guessing.

 

Update: 1 night is 168 php
Still need to watch out under trees (sap and crap)