They do have it clearly posted that there is a 24 hour limit though, but we weren't even there 12 hours. It's always helpful when there are signs for RV Parking because then you know you're definitely allowed to be there. There's plenty of room to maneuver and the lot was basically empty when we were there. There are clearly marked signs directing you to RV Parking, which is a gravel lot next to the paved lot. We also heard in other reviews that it is super smoky inside, so we wanted to avoid that.
We pulled in relatively late, after dark maybe around 7-8pm, so we didn't actually use the casino as we went straight to bed to be up early to drive the rest of the way. We were driving from California to Arizona and just needed somewhere to stop overnight to break up our drive.