avessey, been there done that, it was those powder sluff avalanches that bothered me. The problem is that there is no tent that will withstand the weather, that is reasonable to carry. Carrying an extra six to nine pounds in order to comfortably sit out a blizzard, or high winds is just not an answer (plus the flapping in high winds won't let you sleep). Of course, I am talking about a solo trip. Three pounds each for two people may be reasonable for extra comfort.
I rather suggest picking a time with better weather. Then a bivy bag is quite adequate. Though the weather forcasters are quite often inaccurate, as I have found out on two occasions.
It's sort of a crap shoot, will I be lucky, or will I be looking for my stove (keep it close) in three feet of new powder tomorrow when the storm clears. And keep those boots in your sleeping bag so they don't freeze, but of course you knew that.
You obviously came out alright and kept your head together enough to survive. Plus you were prepared enough. I think a bivy sack is the right plan for a light weight solo ascent. A tent is just too much weight IMHO.
