so I'm putting together a lightweight day-snowshoe pack. This is for more ambitious trips that cover 6-10 hours. I never expect or want to spend the night out with this rig; it's strictly for emergency.
so I have an 11 oz patagonia daypack with good volume;
a marmot hydrogen 30 degree sleeping bag that weighs about 1lb 6 oz.
(Or a marmot helium 15 degree bag that's more bulky and heavy);
a marmot 15 oz Alpinist bivy sack;
and now the problem, perhaps: a thermarest prolite pad, 8 oz's. compact, but a pathetic 2.2 r rating.
So again: given that this is all for an emergency only and so will probably never be put into use in winter, I want the smallest weight/bulk.
The question: should I upgrade to a thermarest prolight plus small, for example, with a 3.8 r value but more bulk and weight(1lb 1 0z.) and that I'll never use in any other scenario, or will the prolite 2.2 allow me to survive a night on snow, with the bivy and bag?
I would expect to also bring a 12 oz down sweater in my pack, and be wearing a cap base, Patagonia r1 and wp shell, etc.
Any general thoughts about this set-up or about day-shoe emergency kits in general?