At a store in Hawaii today, I heard a very special accent and asked where they were from. They live between Edinburgh and Glasgow and were here on a cruise. We had a lovely conversation and he gave me lots of tips for our upcoming trip. One thing that he mentioned that I don't remember seeing discussed in this forum was a 500 mile tour. He said the scenery is absolutely spectacular. They do some of the drive fairly often.
We won't have a car, so it's out of our realm for this trip, but thought perhaps others who are (or will be) looking for routes might enjoy taking a look.
Mike, you've likely done most, if not all of this. What do you think?