The fridge in our first RV was old and flaky. Talking about the FRIDGE, not the RV's owners... The thing's essentially an Ice Chest, Plus a Cooling Unit, Plus Controls. That's why an otherwise good fridge is salvageable with a Cooling Unit, but my point here is that it's also an ICE CHEST. There was a place in town where we could get a block of Dry Ice. That, in one of the Crisper Bins, lasted a long weekend. If you have a source for BLOCK Ice, you can hold your food for several days on a Block or two. Cubed, Chipped, etc. Ice won't hold up.