There has been much said on this thread, but as members of both the Canadian Power Squadrons and the U.S. Power Squadrons and also as boaters who have either vacationed in Canada or owned a cottage in Georgian Bay, I would like to offer a couple of poignant comments. Never under any circumstances lie to law enforcement authorities, it is far less expensive to pay a fair duty than to end up ruining your entire cruise by being fined, jailed, etc. Note that the Canadians are well aware that their prices for alcoholic beverages and tobacco products are much higher than those in the States, but also that their main industry is TOURISM. Let them know in a "nice" way that you fully intend to replenish your bar stock with their excellent products on an as need basis, because you don't want to be charged at both ends of your cruise! Typical answers to how much booze do you have on board such as: "just my ship's stores", "just my normal bar stock", "only for crew's consumption" are often given a "welcome to our country pass". Returning to the USA is less of a problem because U.S. Customs know that you spent much more to purchase liquor, wine and beer in Canada and that what you have on board will be minimal. Boaters that go between the two countries have learned to keep bottles from each country on hand so that when going into Canada, the bottles on display are Canadian and when returning the bottles have USA tax labels. Not something that many Loopers can do. Trying to "hide" bar stocks is very risky, because if detected, the authorities know you are trying to cheat and the penalties will be far worse.