Ca. upland game stamp about $8.00 along with your license will allow you to hunt quail, dove, snipe, rabbit and pheasant all you need to do is find them.
Duck, you will need a license, ca. duck stamp and fed. duck stamp. If you want to hunt a ca. duck/wildlife refuge then you will need a type A or B PASS it depends on the area. But you can freelance duck you will just need to scout out an area. Most refuge work on the reservation system but you can also try what is called the sweat line where you get a number and when you number is called you pick what is left over from reservations that did not show up on that hunt day.
That said, the reservation system is a whole different ball of wax and i type to damn slow. PM your # and i will be happy to walk you thru that mess.
Good luck, have fun, be careful!!!