Camping is an outdoor recreational activity. The participants (known as campers) leave urban areas, their home region, or civilization and enjoy nature while spending one or several nights outdoors, usually at a campsite. Camping may involve the use of a tent, caravan, motorhome, cabin, a primitive structure, or no shelter at all. In many parts of the world, camping refers exclusively to the use of tents or similar portable structures. Camping as a recreational activity became popular in the early 20th century. Campers frequent national or state parks, other publicly owned natural areas, and privately owned campgrounds. Camping is a key part of many youth organizations around the world, such as scouting. It is used to teach self-reliance and teamwork.
Contributions by Smack, Rmhermen, and Aldreds.
That movie that you are referring so is called Heavy Weights.
D. It designated war zones from which anyone could be removed.