all this talk of riding in snow made me recall as a young teenager xc skiing in the woods with my dad and others, going close to a big old pine tree and finding out how the snow right under them that slopes down inwards towards the tree is much less dense than out in the open.....slid into it and couldnt even get up it was so soft. You move and you sink deeper.

I've had the offer to go ride a fatbike on a trail sometime, and I guess that would work well, but any softer and fluffier than that and it certainly doesnt seem it would work at all.