Well not really. It didn't get much below 20F. I was hoping for single digits to really see how the SMB did in the winter:
Says it all. Stayed nice and toasty--too warm even. The Espar D4 had no trouble keeping the rig warm all night (see my award winning expose "Making Espar-Go" viewtopic.php?f=40&t=7577&p=72473#p72473
). Kept it at 50F all night and even had 12.4V left on the battery in the morning--as long as the heater's glowplug wasn't on.
View from the penthouse:
Now I'm ready to install the tire chains and really try some back country fun.