Correct me if I am wrong but I'd take B. Use that rock wall to not only reflect, but absorb heat. Along with the the emergency blankets reflecting the heat you should be good. I'm curious about the super shelter you are talking about.
I think that the fire is the deciding factor in these two shelters, both can be very warm. The super shelter would require a long fire, the rock shelter would depend on the layout of the rocks. At least that is my experience.
Correct me if I am wrong but I'd take B. Use that rock wall to not only reflect, but absorb heat. Along with the the emergency blankets reflecting the heat you should be good. I'm curious about the super shelter you are talking about.
I think that the fire is the deciding factor in these two shelters, both can be very warm. The super shelter would require a long fire, the rock shelter would depend on the layout of the rocks. At least that is my experience.