These are a couple of sites that we used to plan itThat sounds great mate, I'll have a look at that.
We did the St Cuthberts Way, 63 miles sleeping wild, and that was exhilarating.
https://independenttravelcats.com/north-coast-500-road-trip-planning-guide-nc500-route/
https://www.northcoast500.com/explore-the-route/#close
Just click through the links on the first one and it's pretty comprehensive