So recently I've become interested in snowshoeing and winter camping here in WA. My winter outings will be limited to overnighters, at most 4 nights, and nothing too extreme as far as temp or elevation. I was about to buy a 0 degree down bag when I was convinced that a down quilt with a synthetic overquilt was the way to go, despite the weight penalty. I like the modularity and it seems a good way to deal with condensation on multi night trips.
Currently, I have two 850 down quilts: 20 & 40 degree. I thought about getting a syn quilt, and perhaps selling one of my downs. But I don't know which rating I should choose.
So my question for those who use this type of sleep system: if i had only had two bags, which would be the more practical choice, as far as versatility, weight, AND use here in the PNW?
a 50 degree syn to use with my 20 degree down?
a 30 syn as my main bag here in rainy PNW and add my 40 down quilt to it in winter?
Is it pretty much 6 and half a dozen, or does one combination lend itself to being more favorable?
Appreciate the advice, as always.