We did a road trip in Scotland last year. Lots of driving with lots of stops to enjoy the landscape, short walks, and photography. Happy to share the route.
Day 1 and 2 - Edinburgh, Fringe, sightseeing in the city, Forth Bridges
Overnight stay in Motherwell for two nights as it was much cheaper than Edinburgh. Look in towns around Edindurgh for cheaper options, especially in the holiday season.
Day 3 - To Tain, via Glenshee - Braemer - Cock Bridge - Tomatin - Chanonry Point
We stayed in Tain for three nights to cover the route mentioned below for days 4, 5, and 6.
Day 4 - Tain - Lairg - Crask Inn - Altnaharra - Rhifail - Bettyhill - Dunnet Head - Duncansby Head - Wick - Dornoch - Tain
Day 5 - Tain - Merkland Lodge - Laxford Bridge - Durness - Eriboll - Ard Neackie viewpoint - back to Laxford Bridge - Kylesku Bridge - Nedd - Drumbeg - Stoer - Loch Assynt - Ledmore - Oykel Bridge - Tain
Day 6 - Tain - Fort Augustus - Neptune's Staircase - Glennfinnan - Fort William - Glencoe - Glen Etive
Day 7 - Glen Etive - Bridge of Orchy - Loch Lomond - Kilmarnock for overnight stay
Day 8 - Kilmarnock - Moscow [my wife is Russian and we wanted to take a photo there next to the Moscow village road sign :) ] - Gretna Green - Lake District
Day 9, 10, 11 - Lake District