@ Delightful & Seamus,
Thank you!!

Is it also true that if it rains in Scotland it rarely last an entire day? I read that in my book on Scotland but of course don't know if this is accurate.

Just mentally preparing and gathering info
It may not happen this year yet due to the current situation. I have decided to go by train to London, get on the nighttrain to Scotland. Not risking vertigo in a boat or flight! I'll likely do most by public transport but I might rent a car after all for a few days. For instance, I'd really like to go to Fort Williams area, but from Inverness this is quite the journey by bus. No train. By car it's not that far or long a drive. And renting a car for a few days, or maybe even a day, should be possible financially. I hope.