Similar, but going the other way in the back of a pre-behemoth '06 Tundra DoubleCab. If we rode a larger tandem I'm not sure we'd get away with this upright portage in this particular shell (A.R.E. Z Series). We even had a hard time getting large tandems into the back of our Suburbans before switching back to a pick-up truck.
In addition to just wheeling the tandem in caddy-corner and securing the fork to a slightly modified (and discontinued) Rhode Gear Truck Shuttle / board, I also have a Yakima 9mm tandem mount attached to some wooden skids that does what your rig does, except that it allows me to remove the rear wheel. It either sits on the bed of the truck tucked in behind a second tandem for trips where we might have the opportunity to ride both on and off-road, or is used to tuck just a single tandem in tight up against one side of the bed to free up rear cargo space on long road trips where cycling is secondary and doesn't require quick removal or stowage.
It's proven to be a very good vehicle if I ignore the mediocre fuel economy and/or just average it out against my daily-driver motorcycle which gets something like 36 mpg.
Last edited by TandemGeek; 03-06-08 at 07:00 PM.