Thats very much the impression that I have, plus the media reported that Police Scotland are taking special measures against speeders. I might be more fun to take a motorhome for the three of you.
There's certainly plenty of speed monitoring on the A roads, but who wants to drive on them? They are all full of tourists, coaches, and motorhomes. The B roads are all NSL and on the best bits you can have enormous fun without worrying about being nicked for speeding as you rarely exceed 60mph anyway.