Leave it to Duluth to make the perfect campsite jacket!
The Duluth Shoreline Fleece Windproof Coat (...long name...) is my campsite staple now. It completely blocks out the wind (making it a lifesaver on cold desert nights!) but is light weight and easy to just "toss on". The Coat is also a bit longer than normal coats making it perfect for breaking down or setting up camp without worrying about covering my lower back while bending over!
S and I broke some camp setup/break down records on our last long road trip! Watch out time-lapse below of setting up camp in Zion! We weren't able to take one of our break down though; it started pouring rain on us at 6am!!