Surely that would impact on height climbed and therefore AAA points.
No,
The Route is measured in distance and in height using the shortest (google set to walking?) route from control to control. As the current Audax Rules state 'Allez Libre', we're free to chose our own route between controls. But if we differ from the authorised route, it is likely to be longer.
I have not given much thought to the A82. It is a busy daytime route! but I agree as others have said, very early morning, its likely to be quiet.
But from Fort Bill to Tyndrom is around 50 miles so starting from Spean Bridge, or somewhere near, that puts us at Tyndrom ~5 hours after starting. Thats lunch time Friday, and some delivery drivers may be looking forward to the weekend instead of cyclists, tired after 5 days in the saddle. I'm looking at going down via Oban as its a quieter route, and then working my way back to Dunoon without riding on the A82. The problem will be trying to get the shortest route, which is likely to still be way over the min distance - following the A82. The route via Oban, south does zigzag a little, but the last control being Ardrossan - I may be able to go right down the west coast and back across from Bute. I've yet to look seriously at it - as its next summer and the time tables are not out yet.