What did you think of using the SMA (shug moisture absorber) when in winter and the sock is fully battened down. I've got to try it when the time comes. Won't hurt and a 4x6 inch piece of generic shamwow won't weigh too much.
Seems like Shug had it attached to the ridgeline with a cord, maybe bungie, and then clipped somehow to his top quilt right in front of his face.
Any one know how much moisture the typical (not me or Wisenber!)sleeper puts out exhaling and sweating? Vague memory says exhaling roughly a pint at night....