I don't now about the Inland Empire, but San Diego is jumpin'.
Lot of expansion going on in Indian land. I can think of three casinos doing construction projects in San Diego county.
I assume you've got the info you'd get from trackjack or CBJN. The only legitimate single deck game is at Barona (which I, as a peon, haven't actually seen). Double deck games generally start at $25-$50 mins (which limits my knowledge). Good luck finding a S17 game, the only one down here is in Campo (Golden Acorn), and penetration wasn't so hot when I went last week.
With bets under $100, I hadn't really noticed any heat from anywhere. But $100 might be an important threshold at some low-roller places (Valley View, Golden Acorn, maybe Pauma). The bigger joints (Barona, Viejas, Sycuan) see a bunch more action. (Although just last week, I did see a PB at Viejas really eyeing a dude who was betting about $500 a hand at a $10 table, until he finally busted out). Barona seems to cater most to the high-rollers.
If you want to wong, then Sycuan, Pechanga (Riverside) and to a lesser extent Viejas are all workable, although the games really aren't that great from a rules or penetration perspective. They got a lot of tables, especially Pechanga, which is a frickin' barn (only went there once)
Harrah's Rincon only has about five tables that aren't CSM or 6:5, and three are in high-roller land. It's a joke.
Pala and Pauma seemed like they had potential as good high and low roller spots, respectiely. But I only went there once, and to be honest, they're just far enough away to be annoying to go to.
Personally, I like Barona and Valley View a lot, even though they're at opposite ends of the spectrum. Both at least allow surrender, and penetration is usually at least reasonable.
Most importantly, I haven't found any free booze anywhere.