Nothing wrong with being not happy with the "risk factor" I certainly don't consider it a wimp to not be happy with doing it.
I have been flying that area of scotland for getting on for 7 years now and when I was instructing full time I was doing the trip to Dundee sometimes 3 times a week.
And getting brought up in Aberdeen I have been walking in those Glens for 20 odd years.
Personally I wouldn't go north of Perth/Dundee without 2.5 hours of gas on board. And you might ask why so much. Basically if the runway gets shut at Inv I have enough to go up to Dornock and wait there. If the wx goes to poo I have enough to get to Abz or at a push back to an ILS in the central belt.