Chino!
Fantastic airfield with the Planes of Fame/Fighter Rebuilders museum and I think the Yanks museum is also still there though they were going to move at some point. On the eastern side of the LA conurbation, due south of Ontario.
March Field is a little further east and has a good base museum on the western perimeter of the airfield, also another good museum is at Palm Springs Airport further east still.
Look 'em up; I visited them all about ten years ago and was most impressed.
Planes of Fame have occasional airshows - worth trying to coincide with one if you can.