The concept of taking only pictures and leaving only footprints evolves from backpacker awareness. Special Regulations Permits Permits are required in some areas of the backcountry. Permits can be obtained from the local offices of the land managing agency. The permit must be obtained in advance and must be in your possession during your visit. In many backcountry areas the maximum number of people in a group is restricted.
Large groups are destructive.
Check to determine allowable group size. When hiking it's quite possible you may encounter trail riders along with pack stock. Since stock are easily spooked from unseen sources, it is best to make your presence known. When stock approach, step off on the lower side of the trail while the stock pass. Be courteous in sharing the trail with others.