We are off to Marbella in early 2008. Ferry, caravan sites all booked but like to plan to the last detail. We will be travelling down the west coast of France to the border crossing around San Sebastion. I know this route quite well. We will then be travelling via Burgos, Madrid and Granada to the Med caost and then down to our destination, a route I have never travelled before. I can find no information of the frequency of service stations or petrol stations on this route (A1/N1V). Can anyone put my mind at rest that they do exist and at what frequency?