Richard Rider has a commentary on gambling and Competition in CA's Indian Casinos. The less competition there is, the lower your chance of winning.
But here's the part that too many gamblers are not aware of. There are significant differences in your chances of winning -- depending on which casino you choose to visit.
How do I know this? I have too many degenerate friends who have visited too many casinos too often. And yes, I occasional go gaming as well.
The general rule of thumb is that the fewer casinos in the area, the worse the payout odds are on the table games and slots.
The Chumash casino outside Santa Barbara is an infamous example. It's the only casino for maybe 100 miles, giving them a de facto geographic monopoly. The odds on their games are quite inhospitable. In addition, the staff is too often deemed surly by patrons.
To a lesser extent, the same is true for Pechanga, which services Orange County and much of L.A. They are one of the few options for the area, so they needn't offer attractive games and slots.
OP: Another BIG rule of thumb: IF THE TRIBE WILL CHEAT ITS OWN PEOPLE, THEY WILL CHEAT THEIR CUSTOMER. Here is a SMALL list of tribes in California that have CHEATED their people:
Picayune Rancheria (Chuckchansi)
Avoid these casinos and SAVE. See this post HOW TO WIN AT THE PECHANGA CASINO