It's fairly common to see Honda Gold Wings or Harley touring rigs cruising down the highway with a trailer in tow, but the idea is hardly new. Once again, the dusty shelves of The Kneeslider research library yield this plan from a 1930s Popular Science magazine article for a motorcycle camper trailer by an unnamed German inventor. It isn't just a carry all for saddle bag overflow, either, this has a double bed, closets, pantry, cook stove and roof rack for a canoe. Considering the motorcycle engines of the time, it might have taken a while to get up to speed with a rider, passenger and fully loaded trailer, not to mention the added air resistance, even though it has a "streamlined housing" over the front wheel, but then, speed limits were lower, too. "Cyclists now may have the same comforts as autoists."
I have no idea if this ever went beyond the concept stage but I love the old style engineering and design. The teardrop shape reminds me of an early Airstream trailer without the polished metal finish. Cool stuff!