from Leave No Trace Center for Outdoor Ethics:
https://lnt.org/blog/winter-camping-poo-check-it-out
What to do with your Winter Camping poo? If you don’t have the luxury of portable toilets near your activity area, you’ll need to consider how to dispose of waste properly. The soil is usually several feet out of reach and hard as a rock unless you can locate a patch of bare ground where a trowel can penetrate the duff.
Burying it in the snow isn’t acceptable. Human