This is a fine example of the stuff winter backpackers seek out---whiteout conditions, a high meadow pass (Elk Garden), and the opportunity to set up in the meadow and hunker down for a couple days. The fact is, a Southern Appalachian winter storm WILL let up eventually, though it may take 4 to 7 days. What's wrong with getting the shelter squared away (I mean a tent) and going to basecamp mode for a while?
Which brings me to another important point: Winter AT backpackers must be prepared to alter their schedules, sometimes drastically. Such changes often causes them to quit the trip and bail as the 2,000 mile monster eggs them on and on in impossible conditions. Forget the beast and forget the schedule and just be glad to be out during a fine snowstorm. What if mvt stops for a day or two? So what? So what if you can only do two miles a day in deep snow or severe cold? It's called Winter Backpacking. The big old 15 to 20 mile days you've scheduled beforehand mean little when Miss Nature decides to open up a can of winter whop lash and wallops you with a high ridge winter storm. You'll be lucky to pull four miles a day. Which is totally all right.