San Bernardino - San Manuel - Mostly shoe/CSM they had a 6:5 DD towards the back for a while, but no idea if it's still there. (Note that they'd still be about two hours away, one-way.)
Morongo and Pechanga would be my two recommendations, based on location and nearby features. Penetration on a DD is mostly around 60% single deck, if they have it, are mostly 6:5 and plays hands. Some (most) are NRSA on DD, though I don't recall which. All Indian casinos in the area are H17, DAS, split to 4 hands, split aces one card.
