Ullapool to Clachtoll is a 35-mile walk, which I reckon I'll be able to do in 3-4 days at a thougtful and leisurely wandering pace. Wild camping is legal in Scotland, on the understanding you'll follow the general principle of "leave no trace", which means once I'm equipped (I'll need a tent, for example) I will be free to explore the country as the spirit moves me.
Along the way, such sights as this:
Indeed, the Black Loch.
And this - note the solitary wanderer -
And over the ends of the earth...