I run with my refrigerator on. I shut it off for refueling; while it is on opposite side from the fuel fill, that doesn't keep the guy in the next lane over from spraying gasoline into the fridge intake vent.
I pack frozen meals because they are convenient, canned food in pantry, dry stuff in a cabinet, perishable meat and vegetables, and drinks I want to keep cool in the fridge.
Going to a 3-4 day RV club gathering, I'll plan meals and bring the ingredients for the whole campout, and this includes a lot of cooking for other people (pot luck). Out alone for a while at the lake, I'll bring stuff for a few days and shop to replenish it. On road trips with one night stops, we would pack food generally for breakfast and lunch for a few days, supper for a day or two, and replenish as we go by pulling into supermarkets with roomy parking. A lot of times this meant finding something new, particularly fresh local produce.
So it can be different going camping vs traveling.