Once at their worksite, the students work eight hours a day, six days a week. The crews are led usually by two trained, experienced crew leaders, men and women over the age of 21. Most crew leaders are college students or teachers, though there are leaders in their 60s. The sponsoring organization such as the Park Service or Bureau of Land Management provides instruction and tools, but the crews are responsible for completing their job without supervision. On days off, they may undertake an ambitious hike or just relax around camp. At the end of their conservation project, all crews take a short recreation trip to enjoy the area, often a backpacking trip.