Those are actually good refrigerators. If the other suggestions here don't work and you really do want a different option, look into 12V compressor fridges and solar on the roof. I went this route and love it. (Running the wiring on a pop-up could be an interesting exercise. Perhaps have a connector, and insert an additional length of wire when the roof is raised.) Much better temperature control, very efficient, and more space inside the fridge. It is a pricey option though, so whether or not it works for you might depend on how long you keep things. I tend to keep trailers and other vehicles for ~10 years or more, so the price gets amortized out over a long period of time.