Parked overnight, guy appeared as soon as I drove in, and was there when I left. My luggage was in the hotel, not sure if anyone watched over it overnight, no fence or booth around the parking lot, looked safe enough. After all, small city, not many outsiders, mostly tourists. If you have to leave luggage in the car overnight, don't open the trunk after parking, cover it up, can't be seen from outside ?
España Q&A