With the freezer, have you thought about freezing containers of water in with the meat when the freezer isn't full? Okay, you may have to fire up the generator to get everything frozen to start with but when you switch it off, the frozen water will keep everything down in temperature until you fire the freezer back up in the morning. If its not too hot out, the frozen water will probably cut down on the effort the freezer has to put in to 're-freeze' in the mornings.
Just a thought
