That the design I'm going with. Plus the ability to raise or lower the
rack. I would like to load a motorcycle in the bed. In order to load the
motorcycle into the bed the rack must be higher than the roof of the cab.

Maybe consider a rack that covers the tent box, but can hinge up and lay
over on the side of your car when you raise the tent? Or else a 'popup tent'
that keeps the boats on the roof?

--riverman