Incidentally, I think Dougie McLean wrote 'Caledonia' when he was on the beach at Perros-Guirec. Tennents used a 'Hibernia' version to sell the Irish lager at one stage, so you'll know what to hum on the way back to the ferry.
I hitch hiked in the area many years ago, and the local folk were amazingly friendly. If you get the kindness that I experienced you'll have a great time.
Safe journey,
M
