a VirtualTourist member
While snorkeling where do you keep your wallet? Do tehy rent lockers?
You lock it up in your hotel. One does not take valuables along when doing watersports.
beside what you need to pay the trip -inadvance- just have some note with you in case you want to buy something after the trip. you don't actually need anything else, in case the passport it needed, you keep on boat.. of course.
to me it happened at Ras Mohammed (Egypt), but years ago.. I've been told to take passport with a visa stamp from Sharm El Sheik and an other place it's been in Malaysia, off Selingan (Turtle) Island where we've been also told to be careful to do not go too close the border.. it was not a joke we saw both, Malaysian and Filipino, soldiers.
I don't carry much when in the water but I find that my small Pelican cases do quite well for some cash and maybe a credit card.