RV parking is in the lot in front of the casino. There are no designated RV spots, you park across car spots the same as you would at WalMart. Parking is allowed, sometimes for days. This is a safe parking spot with many eateries within easy walking distance.
I have not parked here but I own a winter spot in Pahrump, so I am familiar with the area. I have spoken with casino employees who all say RVs are welcome to park.
Casino is smokey and the food is typical casino fare.