Very nice Snow Shelter Pics CANOEDOGS.
I have built Quinzee Snow Mound type shelters before but found that you get very wet digging them out, a waterproof outer layer of clothing in a must. They were comfortable to sleep in.
I agree with Williamlatham in his post that a Snow Trench type shelter is much easier to build and you do not get near as wet. Many years ago as a Scout we rolled large snowballs into a circle, put a brush/snow roof on top and slept in that.
I think Tyber has the right idea that if you are doing SAR work then having a type of shelter along for both you and the victim makes a lot of sense. I guess that weight/bulk is a real factor when considering how much gear you can carry.
Last winter I added a
2 Person Bothy Bag to my snowmobile kit. It is a large DayGlo Yellow, Ventilated PU Coated Nylon Bag that you and another person sit in. When you lean against the walls it forms a tent around you to block the wind/rain, while retaining some body heat inside. You sit on the nylon but insulation under you would be important, especially if on snow or cold ground. I have not tested the shelter yet but my teenage son used one as a rest shelter in the rain, while climbing Ben Nevis in Scotland 2 years ago, he liked it. The shelter weighs about a pound and does have some tie loops so you can bush-rig it into a temporary tent.
I guess a lightweight reflective All-Weather/Casualty Tarp or Basha Type Tarp in another option for setting-up a temporary shelter, might be small for 2 people. Mike