I need a larger camper
I know that this is not a truck camper, but it makes me want to upgrade my camper to include more toys :B Here are links to some articles on it: Article 1 Article 2
Forum Discussion
I saw the smaller cousin of that rig in Morro Bay a couple of years ago. It has more resemblance to a TC than the OP's photo. Still, you gotta wonder what makes the designers and builders of these odd contraptions tick.
