Driving in below freezing weather

When we had our 30' 94 Southwind, we traveled from Seattle to NW Oklahoma, and back, staying there in Oklahoma for a week at Christmas. It was -10 and high wind while down there. Felt like needles going through ya when you wend out. The motorhome had a heated basement, but I did add an extra space heater with a thermostat inside the utilities area to keep things above freezing. All pipes were fine. The people we stayed with on the Ranch had rooms for us inside, but the cats stayed in the RV. We kept the heat on of course, nice and toasty. The ranch was 40 miles from the nearest town, so they ran all their trucks, and home heating on Propane, as well as a wood stove. They had 3 monster propane tanks that we were able to refill our tank in the RV from. Kept things nice inside.
Traveling we used the dash heat and the furnace. Usually drove straight through with multiple drivers. However one year on the way back to Seattle after Christmas, at 2 AM, in Northern Colorado, there was heavy fog, and 19 degrees. Couldn't keep the windshield defrosted. Pulled over to scrape it. The ice on the road was clear and thick. All the trucks were still doing 60-65 mph. Crazy. Decided to pull off for the night. No rest areas open, all closed for the season. Found a convenience store and spent the night there till things thawed a little. Never spun a wheel ever, but decided to play it safe that trip. We had a ball as we always do. Good memories.