Train to scotland. offroad tour.
I have a non technical / highly scenic route you can use or modify and there are plenty of others out there. Train to stirling / road to callender / sustrans to killin, old railway to crianlarich, west highland way to glencoe, road or WHW to kinlochleven, estate roads to corrour and laggan, road to dalwhinnie, estate roads to kinloch rannoch – road to either pitlochry or rannoch station and train home
150 ish miles and took us 5 days. Only one short section of hikabike
pics here http://www.flickr.com/photos/25846484@N04/sets/72157605318858779/