The chamber pots are for the nights; they still have to be emptied.
Living off the grid is unfathomable to someone like me who grew up in the suburbs of the northeast (though I love camping - backpacking in the woods, not in campgrounds); I certainly wouldn’t try it in places with harsh winters. The area needed to provide for a family is so large in terms of growing food and providing firewood. Small “sustenance farms” in our area centuries ago often provided only part of a family’s livelihood; it had to be supplemented with other work (usually iron mines, furnaces, and forges along the NY/NJ border). The iron industry didn’t just provide work directly for those employed at those locations, but also a lot of work for those that grew the food for men (and draft animals), chopped the wood (and later made charcoal) for the furnaces/forges), and transported the ore and finished products.
Many of the things you couldn’t provide for yourself would have to be obtained elsewhere, and if you are too remote you risk being snowed in for indefinite periods. Living off the grid definitely seems to be for areas with less severe winters, for longer growing seasons and less required heating.
The chamber pot bit was in response to a guy saying it would suck to have to use the outhouse in the Winter - may be mainly for the night, but can still be used during the day when conditions say "ouch - frostbitten arse!" Can be emptied at one's discretion while fully bundled...
Back it the 50s we knew some country folks that still had pumps, outhouses and chamber pots.
Even then, it wasn't considered a comfortable lifestyle despite the ready availability of convenience/repair items.