If we are en route to a new destination, we just pull into supermarket lot and shop. Easy to do with small trailer. But mostly, we re-supply our larder using our tv when our tt is parked boondocking or at a campground. We have a big fridge, so we only have to shop once a week. You would be able to do the same thing with 24ft Class C.
Jim. 2021 Canyon Denali 4x4 3.6L, Husky C-Line
2021b Micro Mini 2108DS, 170AH LiFePo4, Xantrex XC2000, 110w Solar Suitcase, Champion 2500w df