inigo88
Composite-lover
Yeah plus Hemet-Ryan has a CDF tanker base, Lake Elsinore and Perris are both huge sky diving schools (Perris Valley even has a DC-9 that they let skydivers jump out through the rear airstair door), and Perris also has an ultralight runway. Elsinore ("Skylark") is also a glider school, and they have hang gliders flying off the mountain just to the west of the lake... and Hemet has or had glider ops on their shorter runway as well. That's not even counting the military guys flying into March (who probably never notice any of the above since they're cruising in at 300+ knots haha). fholbert could probably chime in since I think he flies out of Chino, maybe it's not so bad. I had just heard from more than one person that the whole area around Corona and east to March and Perris can be kind of a zoo. I'm planning on flying some cross countries up that direction and it definitely sounds like the place to keep one's head on a swivel. 
