Bury a big drum container (e.g. oil tin) to make a pit latrine.
Set the garbage bags inside large buckets or cardboard boxes.
If you find a sewerage manhole where water in the sewers are running, open the lid and make a foothold, to use as a squat toilet
Cite, quoted from Toru Shinshi "Masaka! no toki no ikinokori jyuku" p98
Photos and diagrams will be later added.