Campsites in Northern Spain

[andntrace]

Hi, newbie here. Wifey and I and 5 year old son are looking to venture into Northern Spain during the summer of 2012 for a 2/3 week break using our Montana 6 and awning as our base. I was wondering if anyone has any recommendations for campsites in Cantabria? Looking for sun, sea and sand for 'er indoors, swimming pool and play areas for #1 son and clean washing-up facilities for Dad. It's nicer to gain others experiences as these provide a useful insight into deciding what to expect and where to go. All contributions greatly appreciated.