Thank you so much for your help, Dave MacKenzie! I had assumed it was Highland because it is from "The Highland Balou", but your information has definitely pointed me in the right direction. My Grandfather says "craig/craigie" is a cliff/hill, but from what you have said, I'm thinking it could be used to describe one's face. I'm working on this in a masterclass with Graham Johnson tomorrow (=desperation), and I would love to bring it in the correct Scottish (as opposed to British-influenced). I have never heard of Lallans, but I will look into it now.
Thanks again!