It could probably be worked out for a couple thousand US dollars to have two people go down there for a few days and pose in a resort and do a few dives with the crew. On the first day or two, we could do some setup dives with you to get familiar with the cave and stage a hide-out. Then go out on the boat the third day (just to set the stage) and do a cave dive the fourth day and get "lost" for 4-5 hours. Just bring the underwater iPod to keep things entertaining and it'd be a success.

The only thing we'd need to find out beforehand would be any legal issues if the authorities were called by the dive shop. I'd hate to be stuck there for what is essentially a prank.

Cheers,
Jeff