There is only one store in the High Desert, Aquarium World. It's a small store with some good stuff but I don't buy much from them. I typically use SoCal Tropical and Marine Depot for equipment and Age of Aquariums & Amazaing Aquariums & Reefs for livestock. Frags from other hobbiest. No club up here, the closest would be the Inland Empire one (IEMAS). Henry760 is in Apple Valley and is good guy to go to for corals.
Are you in the High Desert?
~Doug