Answer: You can get a generator. Also you could use empty plastic cool drink bottles and fill them with water and put them deep into your freezer. So that in case the power is out for a long time ,you can use it to keep your other food in the fridge cold. Lastly you can make sure you have a charger for your phone or ipad. This is because you can be sure to have your phone or ipad charge before you drive to another destination.
Explanation: hope it helps :)