If I was going to climb Hood in a day which is what most do. I would have;
A bivy sack like an Integral Designs Salathe'.
A cookset consisting of a MSR XGK, 2 11oz fuel bottles and a titanium pot. White gas is the only way to go in the cold. The canister stoves get sluggish pretty fast.
A Nalgene 32oz Wide mouth bottle to shove snow in to melt into water. If you keep you bottle always more that 1/2 full you can farm snow if it is not super cool. Otherwise fill from cookpot.
A METAL avalanche shovel like a Voile' Telepro. PLastic DOES break no matter what they say.
A PLB because it is either that or a cell phone. I would expect to climb with at least one other person and they might stick with the Cell so we have flexibility.