I plan to walk from Biarritz to Villaviciosa on the Camino del Norte, then to Oviedo and the Primitivo. I have seen a website that suggests stages, mostly in the region of 20 to 30 km each day. But one of the stages is Santander to Santillana de Mar which is 37 km. This is a bit far for me (I'm nearly 70). Do you know of any albergues, casas rurales or pensiones about half way between those two towns? Or about one third the way from either end?