I think your biggest worry is the fridge turning off without you knowing, even then, it would take a while for the temperature inside the fridge
to go above 24 degrees. the previous poster suggested a good idea if you are travelling with others, distribute the medicine around. If you are not going too remote, you could always rely on ice in an esky for backup if something happens to your fridge.
If travelling very remote, another option to look at is carrying dry ice in a small lunch esky to use as a backup if the fridge dies.
Another tip is make sure if you are travelling with other people, let them know you have diabetes and what to do if you start to go too low. Have a great trip away and enjoy.