I had an icebox in my old pop up camper. It was okay for hot dogs... but we kept most everything else in the cooler. Now, if you can get your hands on a small chunk of dry ice, you might be able to turn the icebox into a freezer!
By the way, there are companies that sell kits to turn an icebox into a fridge
. Probably easier to just replace it with a fridge
, though. I'm getting ready to replace the original fridge
in my '84 with a new one. Camping world has 1.9 cubic foot Dometic fridges for $484. Mice gets cold... but it has a big freezer section which is just about useless to me. It's a bit rusty around the edges, too.