For whatever reason there is no sticky for travel issues for California. So the answers are dug up, posted and discussed frequently. Here's the Ca. DoJ website on travel.
https://oag.ca.gov/firearms/travel
There are some things to consider. It's clear that one can't use a glove compartment. It's not entirely clear what a "utility" compartment is. One also has to observe the magazine capacity laws (10 and under), nor can one "import" an assault weapon. Those are defined in other places. Also, one should be aware of/wary of potential problems transporting a firearm to/from the vehicle to avoid stumbling over "open carry" or similar violations, etc. For example, a rifle or shotgun is not required to be in a locked container in the vehicle, but, you can't "open carry" it (in general terms). So a casual popping open the trunk and schlepping a long gun from the car to the lodging place, etc., is not a good idea,. It's really not difficult.