In days mostly past, a camper would walk into the wilderness, pitch a canvas pup tent and catch a string of trout for dinner. In today’s era, some families pull into campgrounds in 40-foot custom RVs ...

At left, motor homes, some 40-feet long pulling pup trailers, fill campsites in Billings at the nation’s first KOA campground just south of the Yellowstone River. As travelers demand more creature ...