In May/June, we will be covering quite a bit of territory over 3 weeks in Spain, from Madrid to Analucia and then up north, from San Sebastian through the Pyrenees to Barcelona and back to Madrid, with a mix of cities and hiking. Usually one or two grown daughters will be with my husband and I. Does it make sense to rent a car for the whole time? Are car rentals with a different pick-up and drop-off location feasible? What is it like to have a car in cities? Parking fees?