Getting stuck in snow without a shovel is not fun. The SnowClaw backcountry snow shovel can get you unstuck. It is great for digging snow caves and moving large volumes of soft snow. It also has a rounded edge to take on hard snow. This shovel weighs only 6.4oz.
This shovel measures 12 x 11.25″, so you can easily fit it in your bag. More information is available here.