I would suggest a few things to make life really easy for you.
1. Have your family setup totes. Just get the ones that are sterilite from target or home Depot and set those up somewhere. Right now in Cali, you don't need a heater, thankfully. You want to have your family setup the tubs with air stones and lids just to get things "moving"
2. Take your filtration media and keep it wet. Put that into an ice chest in bags or however you need to do it to keep it cycled. You can also get a big bottle of something like seachem stability for pretty cheap and use that on hand when you get to those tubs.
3. Bag up your fish, they go in the ice chest as well.
4. Regardless of moving anything else that is all you need to have for your fish themselves to move. You can take your hardscape and you can take plants and that stuff too, but it's not a priority so to speak.
5. You ship the fish or drive them, then you would acclimate them like anything else when they arrive in California. Add in your filter media to the bottom of each of the totes and then just let the fish have the "pond life" for a few weeks.
6. Break down and setup the tanks and move everything you need to. This is where you can replace tanks, merge tanks, and so on if you need to as well. Getting a uhaul or something like that for moving all your stuff would be very helpful and the fish can make that journey with you as well.
It's a trek for sure, but it is absolutely possible.
If it was me in that scenario, I would ship the fish and have totes like that setup as holding tubs.