Camden, a small town in the backwoods of southern Arkansas, is having an unusual brush with the outside world. It is a quiet place. At this time of year there are more Halloween dolls tied to its lampposts than there are people in the streets. It also has a reason to keep its head down. The nearby Highland Industrial Park, which has a few manicured lawns amid thousands of acres of thick forestry, is home to the factories of some of…