what are the laws regarding alcohol crossing the canadian-american border & price?

i have heard you can take a case and an ounce of liquor to canada per person, but can't bring any back. also, is beer cheaper over there? with exchange it might be less but would taxes put it over? planing a trip and wanted to plan accordingly. (not trying to smuggle anything, just wanted to have a case or two for a trip)
 
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