Doubt the fella in AZ is boondocking with fridge on propane.
Your stove is pressurized with propane. How many people turn off the tanks before bed?
The hole you make to add cold air behind the fridge will be higher than the lowest vent. If there was a propane leak, it would fall down and out the trailer.
If any of this seems confusing or dangerous then dont do it. If you are somewhat mechanically inclined and able to think for yourself then determine if you see an actual risk. This is not a daily ritual. Its just when temps get to scorching level and the absorption fridge just cant cool when its getting 100F air up the backside.
