I have looked at the tripadvisor page and found 3 places that are
possibilities:

Deetjens, Glenoaks, and Fernwood.

Fernwood looks perfect, but do you think that the tent-cabins will be
too cold in the middle of winter? I have never been in Big Sur at
wintertime and do not really know what I am in for.

Does anyone know anything about Glenoaks or Deetjens? Fernwood looks
like the most secluded, but I could be wrong.