I plan to discuss our use of the refrigerator in our trailer in more detail in another section. For now, I'll deal specifically with setting the fridge as it regards our setup procedure.
When we arrive at a camp, our refrigerator has already been on, so it is already cool inside. So, at this time, we simply make sure that we switch to electric (or "shore" power as it is often called in the RV world). Since the fridge is already on and cooling, this is not a high priority by any means. In fact, we often forget to do this for several hours, or until we happen to look inside for something and think about it.