Southern California has every type of wave, and it is one of the few places in the world where if you can afford it bring every sort of board from the very longest to the very shortest. That said, if you’re flying in on holiday, it’s also the easiest place to find secondhand boards for a very good price.
So the best thing to do is bring your favourite with you, then buy secondhand or new boards as you need them. In the winter you may well need a semi gun, in the summer you’ll definitely wish you had a long board or a fish, so it’s time to be very flexible on a board front.