You can bring your own wire-framed folding shopping buggy, something like this. You should be able to shop wherever you want.
https://www.walmart.ca/en/ip/Mainstays-Tri-Wheels-One-Compartment-Stair-Climber-Wire-Shopping-Cart-Folding-Portable-Grocery-Stair-Climbing-Cart-Adjustable-Foam-Covered-Handl...
