Originally Posted by
toverly
Are you sure you wouldn't just want to zip two sleeping bags together as a base to start? As Scout campers, our bags are warm, lightweight and dry easily. Then you can focus on a cover and liners instead of reinventing a bag. If you do decide to make a bag, you could get long long zippers from army/navy surplus bags.
That was my first thought. When we camp, we zip two sleeping bags together and cover us both with an old down comforter. Always toasty and it has gotten down to 35 degrees.