We carried a 55 gallon trash bag in each of our backpacks. 3 guys. It worked for quarters and as a cover for the packs when raining or snowing.
We carried a tarp for a just-in-case shelter.
I am fortunate....my father was a meeeeeeeean alcoholic. My mother in law was a sloppy alcoholic.
(Met my wife when we were 17). I snuck some alcohol as a teen. A very close friend died in an alcohol related crash when I was 19. Never touched a drop of alcohol ever again after he died ( almost...