Try 5 miles west of Reno from the 395 on I-80. There is a large RV park by the Cabela's. Large spaces, shuttle to the casino and Cabela's right out of the park. Been there twice, but the name escapes me right now.
Cabela's is located in Boom Town but I don't remember the name of the RV park. I think it turned into a KOA. They used to have a free shuttle to the casino. I stayed their a couple of times and was fine.