As far as leaving your vehicle is concerned, dont leave it in Spain untill you get  to Tarragona. When traveling on the Barca motorway the robbers will throw a stone at the side of your vehicle making a loud noise, then draw alongside pointing to the rear of your vehicle telling you to stop. DON'T., they want you to pull in so they can rob you. A friend of mind got into a fight on the side of the motorway. :o