But with their return to their pre-island lives, a psychologist will be available to help Castaways who need it.

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"We can't really complain that the poor are heavier, when what we're donating is our kind of castaways, " she says.

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Their boat is caught up in a storm and is torn apart, stranding the castaways on the island to fend for their survival.

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Is it necessary, for example, to refer to the work on battle fatigued second-world-war soldiers, in order to explain the despair of the castaways?

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For one thing, stands of tapioca and sugar cane have been planted around the island lest the "castaways" prove less than successful at foraging from the forest.

CNN: Have Footage, Will Travel

Among the rental items: a two-meter-long snake, an orangutan and some lizards and tarantulas. (The island is home to such creatures as pythons, macaques and fruit bats.) While the castaways need to be mentally and physically fit, wilderness experience isn't a must.

CNN: Have Footage, Will Travel