Located about halfway between downtown San Diego and El Centro, Golden Acorn Casino and Travel Center is distinctive in several ways: It’s the region’s smallest facility, the furthest east and the only casino truck stop. The San Diego Union-Tribune’s Ultimate Casino Guide takes a spin at the region’s 10 properties.Ī sure bet for: Travelers along Interstate 8, long-haul truckers, shuttle-bus day trippers and anyone craving the signature $7.77 prime rib.