Whether you go camping with a tent or a motor home is an individual choice but bear in mind some of the campsites have roads and sections in which to manoeuvre your motor home that are far from generous, especially for some of todays larger vehicles.
Having been the one running up and down narrow streets in rural Spain only to find we can´t get through is stressful to say the least. We had hired a five-berth motorhome for a weekend exploration and had one or two hairy moments.
Also some of the Spanish towns were designed around mules and not large four wheeled vehicles so be prepared to leave your motorhome at the outside of some towns. Athough for the larger cities that is easy, park in the tram parking and take a tram into the city centre.