Take as many comfort and scoff breaks as you need, I normally get round with three taken at fuel stops but if I need more.
Back in the 1970's fuel stops in Scotland required proper planning, today 24 hour fuel stops are never too far away. I arrive at Squires with a full tank and fill up at each 'corner' (Rivington, Fort William, Wick and Dreghorn Link) and then some. In the past I've stopped at Carlisle Tesco, Lesmahagow Tesco, Inshes Park (Inverness) Tesco, Aviemore BP and Pitlochry BP and reluctantly the Washington Services A1(M).
In 2022 three of us rode the Wick to Edinburgh section via Braemar and the Cairngorms so we fuel stopped at the Grantown-on-Spey Esso, it adds an hour or more to the ride time and you need to leave Wick before 16:00 hours to clear the twisties and get on the M90 (Perth) before dusk.
Yes, the RBLR 1000 entry fee includes free camping on both Friday and Saturday night, just don't pitch up on my favourite spot
