"Auto Camping" was a very popular activity and grew rapidly as cars became more available. I have an Auto Camp brand gasoline cook stove from the period. Part of the "Auto Camp cook kit", the little stove is similar to a Coleman counterpart but much earlier. Pretty cool item.
Unfortunately, the camping craze grew to a point where it was starting to destroy the very sites that people came to see. Strict regulations we still have today were put into place to control the flood of people.