Go for it. Dig yourself a dog house. Work harden a platform by stomping an area longer than you are tall and wider than your width, you'll figure out exact dimensions after making a few. Then, cut blocks with a snow saw (you are carrying one for your avy assessment right?) or shovel, which isn't as effctive. Place the blocks either flat across a long pit just wider than your shoulders, or tilted like so: /\
When you get to the head area, the tilted method will provide sitting space and you won't feel like you are in a coffin. You can get real fast with this style of shelter, depending on the snow structure. Even faster is finding a wind drift and burrowing in. Or how 'bout a nice big pine/spruce/fir tree to hunker down under. I have spent plenty of nights on just a stomped out platform in my bag and bivy too. Hope this is helpful, have fun out there and let us know how it goes.