Speaking of blankets, if you are short on storage space, at the truck stops you'll find those fleece blankets. They aren't nearly as thick as moving blankets, but they'll do nicely when folded once or twice. It's a good idea to carry a couple of those, anyway, in case you get stranded with no heat, 'cause they will keep you warm. And as long as you've got 'em for emergencies, they make great blankets for the freight if you ever need them for that. I carry one of the fleece blankets, and I also happen to have one of the thick wool moving blankets. Never had to use them to keep warm, yet, but I've used them 3 or 4 times for freight.
Slow and steady, even in expediting, wins the race - Aesop