Randy,If you lay it over on one side you will have to flip it back again to work on the other side, several times. While on its side it won't be easy to work on either the side that's up or the side that is down.
I built a rotisserie for my wagon and used it for both the frame repair and the body. It made working on it much easier due to having it at a good working height.
Go to ASU willys truck website. Look at photo gallery 3 18 b. The rack in this photo works. I made one for my wagon project. The guys that did the media blasting and bodywork loved it.