In my off road exploring years I always had a Coleman or Igloo on board. Back then I've never heard of a Yeti. I've been gone as long as two weeks and never had an issue with obtaining and keeping ice on board. On my trips I ate from a can or cup, but did carry bacon or sausage, hash browns and eggs. Breakfast is my favorite meal of the day. And often breakfast for dinner.
If I was to do it over again, I'd still do it my old way. For the price of a Yeti and how little I'd use a cooler, I can buy a lot of ice and still be money ahead.