Market Basket is our store of choice, but we'll do Wally World as long as it doesn't involve meat or produce.
I buy some things from Market Basket, Hannafords, and Wally World, but mostly I stock up at BJs. I use a small chest freezer that I got from a friend a gazillion years ago for $50 which pobably costs pennies per day to operate. My basement has metal storage shelving used for canned goods and paper products with tupper totes (mouse proofing since I no longer have a house cat) for other
soft packaged staples. My vacuum sealer has had plenty of use since I first bought it in the early ninties. I buy meat in bulk, butcher and vacuum pack it for freezing. Not only do I get a better quality at a substantial discount per pound I also get the thickness and portion control I want. I suspect my furnace guy thinks I am a frustrated grocer.

(My generator is gassed and good to go for those infrequent times when PSHN drops the load.

)
M/zeit's Scoobie Doo has plenty of room for bulk lots of paper goods. I usually alternate paper goods, dry stores, meat and frozen goods pickups so it seems like I am always going or coming from BJs. The savings are worth it and with the exception of some dairy items and produce (ok milk and ice cream) we always have food on hand if the weather turns south. I can drink dry milk but am loath to eat freeze dried ice cream.