Looking to meet my sister and her family in Europe next summer. Likely to be August (I know 🙈). They are flying in from California and we are flying from the north of England. We are looking at San Sebastián or somewhere north coast that has good surfing (this requirement is non-negotiable). I know it's the most expensive time to travel but is there anywhere we can look for cheap accommodation? Where do the locals stay? Hotels and Airbnb all look quite pricey. We'd be up for a caravan (although not sure if that would be too hot?). Are there other locations we should consider that are cheaper? It's 4 adults and 3 kids (14, 7 and 7 next summer).