Shop, see the sights, have a pleasant week end and return with cheap stuff. I generally go in the late spring or early fall when the weather is cooler. Two people can rack up $1600 duty free in 48 hrs. and booze is 33-50% cheaper in the USA. They do not charge duty on groceries you buy.TeasePlease - In order to save a few thousand, you'd have to be spending many thousands which may be difficult getting all that stuff through Customs without having to pay duty and taxes on it.
If you're going to the US to simply save money on purchases you have to factor in a few other things
- Gas - Gas up on the other side before you come back it is cheaper in the US.
- Road Tolls - I do not go that far that the tolls matter much.
- Hotel - I have access to a camper van in the family, no hotel/motel bills.
- Meals - One or two restaurant meals, the rest camper or picnik meals
- Misc. Expenses
You should also know how much you're eligible to bring back.
Less than 24 hours: Personal exemptions do not apply to same-day cross-border shoppers.
24 hours or more: Up to CAN$200 Alcohol and tobacco cannot be claimed.
48 hours or more: Up to CAN$800 This includes alcohol and tobacco.
Goods must be in your possession at time of entry to Canada. All travellers absent from Canada from between 24 and 48 hours, that if the value of the goods you have purchased abroad exceeds $200 after a 24 hour absence, duty and taxes are applicable on the entire amount of the imported goods. Travellers who are absent for periods of 48 hours or more will have the applicable exemption level credited against the total value of goods.
So after you factor everything in, the savings aren't as big as you'd expect.
I have done same day runs returning with $400 of groceries and they wave me through.