[Aug 19, · SUN ISLAND RESORT Harbison Canyon Road May 23, We are saddened to inform you that Sun Island Resort is closed effective this date. After over fifty years of being a nudist resort formally known as Swallows Sun Island Club it has become necessary to take this drastic step as a result of recent events beyond our . By Gary M. 05/ - I am sad to report that Sun Island Resort (formerly Swallows Sun Island) in El Cajon, California, is now closed permanently. The Swallows Sun Island Club is a acre nudist camp located just 30 miles from downtown San Diego. You can enjoy the good and sunny California weather which is one of the beast climates in the world.