Nadine, we turn off frig when towing due to not enuf amps to trailer however, we put two 4" x 4" covered containers containing solid ice plus 2 covered ice cube trays. Trays are put in freezer, 4 x 4s in the frig. We put a C battery operated fan in frig too. Also we keep an indoor/outdoor temp sensor in frig and record a 2 to 4 degree temperature loss upon arriving at destination.