Food is a no-go across the border unless you like hassle. Full stop. Any fruits or veggies? Nope, needs all kinds of scrutiny. Meats and dairy will get you questioned and dumped off. It used to be alcohol too, but now you can bring some wines or beers across.

Shop local.

I use Costco in Colchester. But I use it to buy 3 months worth of TP and paper towels, it's not a great place to shop for food, unless you use bulk rice or flour or have a big party planned where you need burgers and dogs for 100 peeps.