I've got a Caravan Journey on order. Stopped by in Reno to check them out first. All steel, double doors out back, 'Windoors' on the side that swing up and have sliders in them also. Very tough one piece with 5 cross ribs. Should be able to hold a 350# boat on a roof rack. The bed on my new RAM is 21" to the rails and the canopy will be 6" above the cab at 29". So, it will have a ceiling of 50". My friends older ford van, which I've had many, has a ceiling height of 52", so it should be very useful. I don't think it will look like an old man's truck, it will look like a contractor or a Sheriff.
Having a white, four door, shortbed pickup is like having it camo'ed, almost invisible in the crowd.