I thought I had walked into the internet this afternoon. I saw it there, just after the bend, one of those all terrain camper set-ups. I've only seen photos on websites, so I thought I would share my photos with you guys.
You can learn more by searching for expedition OR adventure campers - they don't need roads, they are supposed to be able to go weeks with out needing to be dumped or refilled, oh and the prices $200K plus, sometimes a really big PLUS.
As the camp host I didn't want to intrude upon them so I didn't ask them about their rig, but one of the other campers said that they have been on the road for 6 years.