Thousand Trails Pio Pico RV Campground is a full service RV resort in California located south of San Diego, close to many attractions such as the zoo, Sea World and museums. We are twenty minutes from Mexico, so day trips south of the border are not only a possibility but also a great opportunity. Members come to Pio Pico for the peace and quiet of nature as well as to escape the day to day rush of the big cities. It is considered a "destination" RV campground in southern California, and all members enjoy the hospitality of the staff.