Leaving gas fridge running

Just wondering how safe would it be to leave caravan fridge running on gas for a few days whilst travelling away. We will be visiting Drysdale River Station on our way to Kalumburu very shortly, and Ann at Drysdale will allow you to leave van there free of charge with all care but no responsibility which is great, but as most know, caravan fridges running on 12 volt aren't very efficient What do other people do and maybe Drysdale have rules about that anyway, certainly don't want to risk a fire, or worse Cheers Ray