we did it in 2012 in our kombi van, mainly stayed in youth hostels, up the west coast / islands, into the highlands, across the top Cape Wrath to John o’Groats and back via Edinburgh. Great trip, mixture of beautiful scenery, extreme tackiness (e.g. Loch Ness touristy things) and bloody midges in the evenings making it impossible to go out for more than 5 minutes unless you are covered in agent orange, DDT, those hat net things etc. I was very impressed by that canal that cuts across the middle