Simple idea, and not just for National Parks.
https://www.abc.net.au/news/2024-01-31/poo-pots-promoted-to-bushwalkers-in-tasmanian-wilderness/103374466 (https://www.abc.net.au/news/2024-01-31/poo-pots-promoted-to-bushwalkers-in-tasmanian-wilderness/103374466)
Reminds me
https://youtu.be/G1uE6a_r7Q4 (https://youtu.be/G1uE6a_r7Q4)