Oasis is nowhere near any casinos. The only one I can think of is Sam's Town, on Boulder Highway, now operated by KOA. I would NEVER recommend a KOA but you want to walk to the casino. They have back in and pull thru sites, don't know what the rates are but they probably doubled or tripled them when they took over. Circus Circus may still be operating a few sites next to their hotel/casino, it's just a big asphalt parking lot. Sam's Town used to have a shuttle that would take you to the strip, KOA probably stopped that but call and find out.