I think there's a little taper bottom to top in the lower section, too. Probably to accommodate tapered ribs to stiffen it in the direction the curve doesn't help.
The Beetle tire is ~2ft in diameter, that make the overall length ~8ft. Two 5x10ft sheets of PolyMetal or MaxMetal, cut into 2 and 3ft strips would skin it.
It reminds me of a smaller, more manageable
Airstream Basecamp.
