It is recommended that you put a single ice cube in a paper cup and leave it in your freezer and check it daily to be sure there had not been a power failure at the campground while you were away for the day, or that nothing else has happened to cause the frozen foods to partially thaw and re-freeze again.
If the freezer has been working well, the ice cube should retain it's original shape. If it has melted and re-frozen the ice will be puddled in the bottom of the cup and chances are that the quality of your food in the freezer and refrigerator will be comprised.
Freezer check
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