In case anyone is interested, the flatbed tray was made by the same company as the camper, XPCamper. The camper mates to this flatbed by four positioning pins that go into matching holes in the flatbed and are then locked in place via horizontal bolts through the side of the flatbed. Though I suppose the camper could go on any flatbed if some sort of similar attachment system was fabricated, it's really much easier to keep the flatbed and camper together.If anyone is interested in the camper let me know. I'm very interested in the truck.
Why an auto? We chose the manual over an auto for ease of maintenance and availability of parts. A manual can be repaired just about anywhere outside the US, not so much with an auto as it will likely need to be replaced in its entirety.