Lots to choose from
While I can't speak to hangar space as I'm further south, in terms of GA/EAB friendly you have a lot to choose from, such as Flabob (home of EAA chapter #1), Redlands, Corona (free shuttle to Aircraft Spruce), and of course Chino (home of Planes of Fame).
One thing, when (if?) we get winter rains, Corona can flood. Not every year for sure but I think twice in the last 20.