There's a big one in Anaheim, California every year. The convention center is just down the street from Disneyland. The hotel I stayed in was awesome. You could make it a vaction. Rent a car and drive all over SoCal. You could go to the San Diego and/or LA Zoo, the Aquarium of the Pacific in Long Beach, the San Diego Wild Animal Park, Sea World and so on. You could hit the beach in Hunington or Laguna. Just writing this makes me want to go back.