Always enjoy your perspective & experience, I've never even been to Alaska, let along Denali!
I do know, as you mentioned, a blizzard is a blizzard, (at least to some extent).
I like your idea of using a Spot to possibly keep SAR's & others from launching a mission.
MrNizegy, I think that's a very good choice, even many of us seasoned Skyliners get disoriented when visibility is crap, and, even when it's good, but there's So much new snow, most everything looks different!
Go early on Sunday to beat the crowds.
I think many of us are curious about the "local" who bivied in the chutes on Skyline.
If it's true a buddy hiked / snowed down to Flat Rock & back, good on him / her.