Not regularly but the whole point of this trip was to give colder camping a go. It went pretty well, save for a few tweaks I want to make, so I reckon we'd do more of it. But maybe I'll just start with the 3R (if I can find it cheaper somewhere) and worry about 'more pad' if I need it later.
Not noticeable
If you regularly camp around our below 0ÂșC maybe
No problems here