Do preppers poo in the woods?
Sure, why not?
Incidentally in a prepper/survivalist forum a few years ago I said if we start up a post-apoc community in the country we could sling our buckets of pee and poo in the nearby river, but some people in the forum began screaming "NO NO NO YOU CAN'T DO THAT BECAUSE IT'D POLLUTE THE ENVIRONMENT!"
They said we should poo in a "poo pit" and shovel the stuff out to fertilise our vegetable garden.
So I said "I'd never eat crops that were grown in human poo!"..