Well, having the choice to fly in to LAX or Orange County (John Wayne) airports, I would pick Orange County as it’s South and closer to Oceanside, still close to the Amusement parks in LA and in a bit easier area.
If your Dad lives in LA, ask him which airport to fly into. Orange county or LAX.
If you’re renting a car, pay extra for a premium SUV. You’ll want the comfort.
Travel modestly. The traffic can be very unforgiving at times.
Definitely getting an SUV but we must fly into LAX.