In offgrid locations as in any place of human habitation, effective disposal of human faecal matter and urine is a necessity for health, if not for aesthetic reasons. Composting toilet systems are one solution to this problem.. Be aware that local municipal authorities may have some regulatory powers over these kinds of installations, and there are some practical health limitations on disposal of the finished product (composted humanure). Processing of urine requires careful consideration, but disposal and beneficial use in the manufacture of garden fertiliser (and black powder ) are also factors to consider
Arizona ADEQ has two approved methods of building a compost toilet. A barrel system and an overbuilt Bin. A Ventilation pipe and bug catcher. It's what you do with the humanure that's important. Funny they don't seem to care if you have a means of wiping or washing your hands.
A simple solution to handwashing for outdoors composting toilets... https://youtube.com/shorts/Kuv7nZnIiAk?si=XjGFrDLvaWUPeTbX