Most of the areas you will encounter here are remote and seldom visited in which case you should simply smear your waste around on the surface. The sun is the primary ingredient in breaking down fecal matter as the soil is almost sterile. Do not camp under overhangs or ever build a fire in one. Petroglyphs and Pictographs on the walls are often very faint and can be easily damaged. Never collect, dig or remove artifacts.
Water is extremely rare and a vital resource.
Do not camp near water pockets and never bathe or do your dishes in them. Always filter your drinking water. It is OK to bathe in flowing water but do not use soaps, even biodegradable types. Use earth-tone colored equipment avoiding bright colors. Keep your noise to a minimum.