If you bump into someone else's garbage, pick it up. In the event nature calls and no facilities are available, make sure you bury any human waste at least 6 inches below the soil, and make sure you hike at least 100 feet away from the river bank. Also, burn waste paper or carry it out in a closable plastic bag. Leave unspoiled areas looking unspoiled. When it comes to fires, use an existing fire pan or fire ring, and leave a clean pit.
Garbage collects around fire rings.
This does not allow travel out of the water onto private land. While Montanans are entitled to use waters crossing private lands, it is in everyone's interest to obtain landowner permission first as a courtesy before using private lands, particularly on smaller streams.