If this topic is still being decided upon:
KVNY: Van Nuys Airport
It offers something for everyone - they handle everything from Piper Cubs to MD-80's. They're close to LA, but far enough away that you can be in a rural setting rather quickly.
https://www.google.com/maps/@34.2095954,-118.4905795,2225m/data=!3m1!1e3
http://skyvector.com/airport/VNY/Van-Nuys-Airport
Regards,