Local knowledge / experience nearly always wins over internet searches in my experience.
Looking at making my way from Loch Tae to Mallaig.
(And afterwards The Isles, but that route fairly well sorted)
Avoiding the worst of main roads. Trackriding fine but not too much gnarly stuff . Hybrid with 12kg approx base weight 'bikepacking' luggage.
Not far in excess of 50 miles per day as I like to stop and look at stuff; brew up; take pictures, patronise the local hospitality etc.
Also any good pitch - wildcamp, or 'low key' campsite recommends along the way? Happy to do a couple of miles detour to acheive this.
Thanks in advance for any help proffered
Or point me in direction of bike friendly route planning website