I can't imagine that degree of coldness, Grannynannywanny - it must have been purgatory! I've woken up many times with numb fingers, though!
Yet to do the east coast of Scotland, 'though we were the other side, in Dumfries and Gallaway a couple of months ago, which we absolutely loved. It was fantastic for cycling.
Up until last year we usually did a 6-7 week tour round France and Spain each spring, but last September we had a crash (no-one hurt), just 10 miles from home, which made us think of the hassle that would have been abroad, so we're now probably going to stick to the UK. The fact that health insurance is almost prohibitive now has added to reasons not to go!
I hope your daughter and son in law will be able to resume campervanning when the family have fled the nest!