I'll have to do one of these of my own next week. I reckon the power is essential to run a 12v fridge.. lord knows we are old enough to recall eskys and sliced cheese floating in icy water. We have a lithium battery in the van... Wish I'd bought two pre COVID inflation.
Lol, yeah food floating in water isn't the best way to go. I've had fridge/freezers on-board all my four wheel drives, for years, and couldn't go without it. Even around town, going shopping is so easy and I can multi-task more through not having to head home with the cold stuff.
I'll switch to lithium on my vehicle and the camper trailer next time I need batteries but yep, the cost of them is pretty high right now.