The Conistoga Star pictured below was one of several Wagon based Vehicles. The Booger Buggy up above was another, the Fink Mobile is the 5 wheeled orange creation and the Wagenmister.
http://www.kustoms.us/built-by-ed-roth-the-conistoga-star-pictured-above-was-one-of-several-wagon-based-vehicles/
https://books.google.com/books?id=kfjZRwc0GrIC&pg=PA125&lpg=PA125&dq=Ed+Roth+The+Conistoga+Star&source=bl&ots=MPYJnjJf9J&sig=rjogmkhXLUfEUoZClD9560npK6E&hl=en&sa=X&ei=NRgzVZ6lGYe5ogTJsIBg&ved=0CEAQ6AEwBw#v=onepage&q=Ed%20Roth%20The%20Conistoga%20Star&f=false
http://www.jalopyjournal.com/forum/threads/show-rods-60-70s-stories-pics.218798/