If it was a long crawl through a traffic jam every time I went to get groceries I'd be tempted to get a good sized garage ready freezer [1] and a larger car so I would only need to drive to the grocery store once or twice a month. There's a small grocery store within walking distance that is too expensive and doesn't have enough variety to be my main grocery store but would work for those things that won't keep for a month.
[1] A normal home freezer that is part of a fridge/freezer is typically is designed to work in a room around 55-110℉ (13-43℃) and a normal stand alone home freezer typically works down to 32℉ (0℃). A "garage ready" freezer is one designed to work when the room temperature is 0-110℉ (-18-43℃) so if you don't have room in the house you can put it in your garage.