I do most of my weekly provisioning at a big CostCo. THere are plenty of big white carts--you just pull on eout of the rack and roll on in. They have everything you could need from batteries to filet mignon (which I buy once in a blue moon) and the checkout lines are pretty darn good and very friendly. Occasionally you'll get stuck behind somneone who has thirty three coupns and forty-one items and isn't sure which goes with what, but that's an exception.

But the shoppers are terrible drivers--if they drove cars like that they'd lose their license!