We decided to leave Haro, having been in to town three times, to spend the last 3 days of the holiday back on the north coast where we started. I purchased a little of the local vino joven before setting off for a150 mile Sunday drive. We chose a site 30 miles from Santander between the interesting villages of Comillas and Sant Vincent de la Barquera. A handy bus between the two passes the site entrance 3 times a day.
The Playa de Oyambre is a terraced ACSI site and we are on a balcony overlooking the Picos mountains. We could see snow on the peaks when we arrived but there is low cloud now. The beach is a bracing 600 yards downhill, so we may do that if we have time. Very friendly site owner, excellent facilities with a pool and a good menu at the restaurant, but I think we will still get the boat on Wednesday.
Update: We ate at the restaurant which was excellent quality, presentation and value. TripAdvisor is quite right.