You don't say how old your child is, or how the current schedule is set up to yield 50/50.
You also don't say where you're moving to, other than that it's "out of the state". Nevada? Washington? New York? Germany? Australia? (if you live in Auburn, Reno's NV is closer than Los Angeles) and what kind of travel arrangements will be needed, or you can afford.
Finally, you don't say anything about your child's current school schedule, and what kind of arrangements you'd make to care for your son if you had most or all of the Summer vacation allocated to you (does your job offer you that much time off? Who's going to take care of him while you're working?)
Under California law, before a judge can decide the issue, you'll be REQUIRED to see a mediator. The first thing you need to do is figure out all the logistics necessary for whatever plan you propose.