Given the volumes of traffic found on those which used to be quiet single track roads used for the most part by locals, it can pay dividends to either get up early in the morning or give it a go out of normal tourist season..?

I stumbled on this vid of a chap doing precisely that..

https://youtu.be/vDSifpJxU8c

I have driven that road and it is ace.
He went the other way to us & I wouldn't fancy that in snow in a Mog