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...I wonder what a Catalina would look like as a replacement for ‘Osa's Ark’?
Yeah! :) I suppose a Cat would be spacious enough to trick it out nicely into a luxurious place.
CamperMoging:
http://www.xor.org.uk/unimog/campermog.htm
When we lived in Kenya in the late 1990s, friends of ours visited us in their Unimog Camper. They got a surplus Bundeswehr Unimog with a radio cab and rebuilt it into a camper vehicle. They then drove the thing around Africa. Literally. Germany - Italy - ferry to Libya, then down Africa's western coast all the way down to South Africa, then up the eastern coast and back to Germany again.
How the nutters made it back alive is still beyond me. Because instead of painting it in some nice, vivid, distinctly civilian colours, they chose to paint the whole shebang in a light sand tone, with tan splotches all over it.

When they rolled onto our compound, we were sure they'd get slotted by some trigger-happy rebel with an RPG somewhere along the way. Short of painting some giant cross-hairs on the sides, they couldn't have made the thing look more "military" had they tried.