My x-wife grew up in Soldotna, Alaska. Her mother claimed she had a relationship with Gordon Lightfoot and that "Sundown" was written about her. I had to laugh in the sense that if it really WAS her, it would not be something that I'd want to brag about. All the google searches point to other people. Not surprising, - Although knowing my x- mother in law. The "If I find you creepin' round my backstair" MAKES A BUNCH OF SENSE!
https://en.wikipedia.org/wiki/Sundown_(Gordon_Lightfoot_song)