This article has been out for a couple weeks and I'm surprised that it hasn't been discussed here. So surprised that I won't be surprised that to no surprise my google fu has once again failed me and it's here and I just missed it.
http://www.rgj.com/story/life/outdoors/recreation/2015/03/11/pacific-crest-trail-gear-historic-winter-hike/70150198/
I'm inspired by the fact that they used an alcohol stove to melt snow and I'm emboldened to try that at some point in the future.
As a warm sleeper, I've debated just using a synthetic over-quilt over my MBULSS#3 instead of buying a winter sleeping bag. Looks like that worked well for them here.