The Webasto is turned on when it is 32deg or lower. It is running on low speed with the reverse cycle heat pump keeping things stable. Figure I'll kick the Webasto into high gear the for the next few nights as we fall into the teens and maybe single digits.
A Wool blanket is a great addition, one wool blanket is equal to three micro fiber things (two if they are from REI).
Hot Coco: get a Dove dark choc bar and milk... put it in a pot and heat it up, stir constantly, pour into thermal mug and enjoy. Better than all the powered stuff. I you like your hot coco sweet, replace dove bar with a milkyway.