Winter Camping Tents Can Someone Outline For Me Exactly How To Prepare For Winter Backpacking/camping?

Can someone outline for me exactly how to prepare for winter backpacking/camping? - winter camping tents

I'm an experienced hiker, but I have never suggested a tent in the snow. I will walk by Slovakia at Christmas and New Year. I dressed warmly enough, but there is a certain kind of shop I buy? Or bring a sleeping bag? And what I think?
Experienced outdoorsmen advice appreciated!