Climbed Casaval Ridge, descended into whiteout below "Misery Hill" and got lost for an hour or so, but eventually found the way, 6 hour ascent time from the 9800 ft camp
I made a one day blitz of Casaval on the 19th of March. Conditions were near perfect--clear skies, good snow, no crowds. The route is pretty staightforward, with lots of traversing moderate slopes (30 degrees) and some icy spots. The underlying difficulty is the length and elev gain. The winds picked up tremendously on the summit plateau--gusts strong enough to make me lose my balance a couple times (70+ mph). There were some lenticular clouds to verify this.
Overall it was a tremendous day, and a test of will power to fight through the wind.