Not only does this help minimize impact, it will help prevent you from becoming lost. If you are traveling in an established area, durable surfaces include existing trails and campsites. If you are at altitude or in areas of sparse vegetation, be very careful not to step on vegetation, even in traditional durable surface areas. This thin vegetation is very critical to prevent erosion. If all else fails spread out as a group to minimize impact as much as possible, or find a different route.
Riparian habitat is particular sensitive.
Never camp within 200 feet from lakes or streams unless you are using an established campsite. However, it will be very rare to find established campsites within sensitive riparian habitats. Don t make your campsite. Find a good campsite and use the features around you. Don t alter the area for your campsite.