Originally Posted by
bwgride
I think a better option is to take lightweight but warm pajamas. Rather than a wool blanket or silk liner, maybe wool or synthetic fleece pajamas would be a better option for combining with your sleeping bag. When I go cold weather camping, I use a wool long sleeve shirt and synthetic fleece pajama bottoms for extra warmth. If the silk liner is for keeping the bag clean, the pajamas will serve a similar purpose.
1+.
Or more basic, adjust to temps with the clothing you bring to ride in. I always have thermal tops and bottoms for layering during winter tours. If cold enough at night, I layer up for sleeping. Including wool socks and gloves.
If layering isn't your cup of tea, go sleeping bag and liner. Get one rated 10 degrees lower than the lowest temp you expect. They always exaggerate the ratings. Got a 'partner' to snuggle with? Get bags that will zip together.