My family didn't camp as dad was a grain dealer and summer was the busy season, but my Wife's family made several trips "out west" when she was little.
The most talked about trip started one Friday afternoon when her Aunt and Uncle called and said they were heading to Estes Park the next day, did they want to tag along? Her Mom called her Dad at his mechanic shop and the decision was made. He changed the oil and filter in the '49 Ford sedan while Mom started washing clothes for the trip. By midnight they were packed and went to bed.
Early Saturday morning they started out and met the relatives at the junction of Hwy. 2 & 65 in southern Iowa, and lit out for Colorado.
Meals were just a stop along side the highway under a tree and the evening stop was usually the same thing except a surplus Army tent gave shelter. A small campfire allowed for a hot supper and some heat late in the evenings. Several photos show the cars and campsite 50 feet off the road. Sure couldn't do that these days!
This was a 2 week trip with 2 adults, and 4 kids in a 4 door Ford car, along with clothes, food, and camping gear. Quite an adventure.