Great trip report. I dive in the Philippines often but never in Luzon, so you might have convinced me to try somewhere new. It sounds like you were on the Divers Ready tour!
And @staggsSevin I haven't had a problem carrying my regs with me into, around, and leaving the Philippines. Anecdotal so YMMV. They do weigh domestic carryons sometimes.
Thanks @YYCLuke I'll leave them in my carry on going there, but when I leave Anilao for Puerto Princesa I'll go ahead and check them to be safe, and then check them when I leave to head back to the states.