Camping is an activity where people stay outdoors, away from home, in a shelter such as a tent, a caravan, or a motorhome. Camping was once done out of necessity, such as the travelers crossing the Oregon Trail. However, by the 20th century, it became a recreational activity.
In 1985, after Marty got his truck, Bobby joined Marty, Paul, and Lee in The Pinheads, when the four of them went on a camping trip. In the original timeline, when Marty didn't own the truck, they took a bus to the campsite instead.