I’ve got a Resi fridge with 2 GC2 batteries, and an inverter.
I go to the storage place, turn on the inverter, hookup and drive the 15-20 to the house, and you can tell it is cooling at that point. Then add the cold stuff from the home fridge, and all is good. It cools down really quickly.
I’ve driven 10 hours with the inverter running, and it still had power. My next rv, I’ll make sure it has a resi fridge also.
I do live in the southeast, so there is not really any boondocking.