Another option is a small tent trailer. Livin' Lite makes a line of aluminum tent trailers. The smallest, lightest model is the
QuickSilver 6.0 Automotive Tent Camper Floorplans | Livin' Lite RV.
I looked into these before buying my
Scamp. They give a lot of room for the weight, and the chassis and box seem well-constructed. Set-up is simple and does not involve any mechanical systems. However, the tent fabric seems flimsier than other tent trailers I have been in, and I don't think they would do well in wind. Not for cold weather, either.