WanderngFool
Active Expediter
Or how about one of those motorhomes with a garage in back for ATVs and BIKES ?
I'd think you'd have to beef up the back end.
I've wondered why you Sprinter guys aren't using toy haulers too. Ok so a little surgery to a suspension component or two and your fuel economy would suffer a bit. But imagine having all that room! And an almost real kitchen! And an almost real bathroom!