I think it may have been in either Portland or Eugene Oregon that I saw a number of mini covered wagon looking bike campers. Never got an inside look, but some of them were painted up bright and cute.
Parked beside a lake in the Portland area, I met a guy with a 4 wheel, pedal powered motorhome. It had electric assist and a gas generator. It was the coolest thing I think I've ever seen, and had every amenity imaginable in a very small package, but due to the design it didn't look cramped. The kitchen was under the bed, which flipped up and both sides had sliding doors to give you access to the kitchen, and/or seating. It was designed to only sleep one, but 3 people could sit sofa style comfortably. One end of the bed flipped up for the toilet, and other parts of the bed flipped up to create the drivers seat or lounge chair. I was VERY impressed.