With a mini fridge and microwave, you really can't rely on it for actual meals. It's fine for keeping snacks overnight while you refill the ice, and reheat any dinner leftovers. (Also many mini fridges don't have a freezer compartment so the blue ice is useless). We found that bringing plastic grocery bags makes ice much easier- fill several of them full of ice and use them as ice packs around your food. Then empty the water from them (and drain the cooler) then use the bags at the ice machines at each stop. Much easier than trying to refill a cooler at the ice machine.
We generally assume the cooler is just for car foods and water bottles (we keep a flat of water bottles in the car, stage in enough for each day into the cooler, and usually have to buy more somewhere during the trip). You can take those instant oatmeal cups (heat water in microwave) or similar for breakfasts in the room (someone usually gets hungry before everyone is ready to head out). Small individual shelf stable milk is good for any little cereal cups or we take a large bag of granola or Kashi go cereal (but then you have to have disposable bowls - we always take a pack of disposable utensils and a roll of paper towels in the car, as well as a few plastic grocery bags to use as trash cans). We like individual guacamole cups & individual hummus cups for car snacks, with a bag of sliced veggies and/or chips/pretzels. Also good are those individual bags of sliced apples.
We are a family of 4 and find it easier if everyone has their own bag (we use big duffels, on some trips the kids can share one and DH and I share one), with each day planned/separated and labeled into packing cubes or Ziploc bags. The "extras" /specialty items go in a separate cube/Ziploc bag. Plan to bring extra Ziploc bags or grocery bags to separate dirty clothes, dirty shoes, and wet items.
We love road trips so let me know if you want more info.
Sent from my Pixel 3a XL using Tapatalk
Mama to DS1 Punkin (2/04) and DS2 Boo (1/09)