Hi, could someone give me the down low on the appropriate sleeping bag. I tend to sleep hot so have purchased a 32 degree lightweight bag for my 10 days on the Camino the end of January. I have read several places that you should carry a 3 season bag for Camino in winter because some of the Albergues are not heated at night. I have a 20 degree bag which is great when it's cold but not sure how the Albergues are getting much below 40 degrees without the pipes freezing. HELP.