We keep our Dometic in our tow vehicle and power it with the 12v plug until we have AC at a campground. An extension cord through the side window with a garbage bag draped in and over the upper door channel before closing in case of a rain shower. We use the CI cooler in the galley for all our unrefrigerated foods.
Same. I have the silver Coleman that CampInn sells.
Its kept cool as a veggie/fresh food cooler by rotating in big yeti blocks and a few water bottles frozen once a day, the melted ones going back in Dometic that I set at 15 degrees for frozen meat for me, ice cream for DW.
Note the Dometic just gets too hot carried in the galley hatch down in any kind of desert heat as there just is not enough space for circulation for the condenser. (The owners manual stipulates at least two inches all sides)
I've even tried carrying it strapped down inside the cabin of the CI plugged in and powered by the battery/roof solar sharing the load with the CTEK charging from alternator- works brilliantly but once the car goes off and the sun goes down the Dometic will drain the CI lead acid overnight (in freezer mode). Plus humping it in and out is a hassle.
So its easier to just keep it strapped down in the tow vehicle, parked in shade where it has more airflow around it and if needed I can turn on the car and run AC to further help the Dometic condenser work with cooler ambient air.
So ya need a genny for extended boondocking to use the Dometic as a freezer 24/7 in hot ambient temps on cloudy days or parked in shade. You could run the car in idle but its not a very efficient generator...
I've also experimented with a separate sogen in car supplied with separate solar to feed the Dometic. My rough analysis is you need at least 100ah lion bat-tree and 200w solar panel to feed it...similar to the CI lion and solar roof, feeding lights, fan, recharging iphone, tablet, CPAP etc depending on total devices/how long.
I'm a max powah user (Dometic in freezer mode in desert ambient air consumes much more than one in cooler mode in cooler temps) and
I am deliberately pushing the envelope, so I can stay out dispersed camping several days...including shoulder seasons.
The Experiments continue!