The best we could determine, the casino has no official maximum length of stay, and no official policies beyond the normal parking policies that apply to their other lots. Sash and I set up our toy hauler here in March of 2018 for 4 nights. The Casino maintains a policy of allowing visitors to park their RVs in a special lot located behind the old bowling alley. Morongo Casino, located in Cabazon, CA, is just minutes away from Palm Springs, and thus is a popular place for some free RV boondocking.