Indeed, I would recommend Cadaques for an overnight stop, similarly Castejon de Sos and of course Cangas D'Onis. It was probably due to the time of year (September) but we didn't find it too busy, typically the busiest places we found were Potes (we passed through but didn't stop or stay over) and equally predictably the Ferry port at Santander where hundreds of bikes queued for the Pont Aven, that wasn't a pleasant experience but once aboard all was well.