FOPA (Firearm Owner Protection Act) is googleable. It gives you the basic skinny on how to travel with firearms through hostile territory. The go to
www.handgunlaw.us to read up on the laws in the states you will be transiting. The charts are easy to understand.
That being said, if just one of your firearms is
verboten in California you lose all protections under FOPA. California Dept. of Justice maintains a roster of guns they do not want you to have, as well as an explanation of how you can lawfully bring in a firearm that would be illegal to purchase in California. Read both carefully.
You will be travelling across the country in a Jeep? Read FOPA very carefully about how your firearms must be stored when your vehicle does not have a separate trunk. And not that a trunk cannot be broken into, but lacking one raises all sorts of concerns about securing your firearms during rest/meal stops or leaving them in your hotel/motel room when you go out. (You were not planning to leave them in the Jeep overnight, were you?)
Depending on how many firearms you are dealing with, it may be easier/safer to ship them to yourself. UPS and FedEx offer "hold" service at their hubs, where you can pick up the packages if you do not have someone who can receive
BUT NOT OPEN the packages.
stay safe.