Planning a road trip with kids (10,13) in October. We.re in France and 4/5 hours from San Sébastien and Bilbao and Intend on using that as a 3 day stop heading south before going to Porto and Lisbon. But heading home I can see several Spanish cities I do not know and was hoping for a tip on which/where to break the journey. We can do two nights or possibly three so we get to see the sights. Salamanca looks promising but is possibly not the midpoint... Valladolid and Burgos look better placed. Thoughts? Advice from those who have done it before?