Not sure about what the best way in from the U.S into Nova Scotia is, but I can tell you this the CAT Ferry is crazy expensive, and you would be missing a nice ride across the lower main land and St. Lawrence River by taking the ferry. In Canada we have provincial and federal taxes, and as stated above you would be able to reclaim a big chunk of the taxes you paid. The federal tax is constant regardless of the province or territory, while provincial taxes do vary, in Ontario we pay a 5% tax on goods and services, and 8% federal tax. Anyway, I did the trip last year and loved the area and atmosphere so much I extended my trip into P.E.I, New Brunswick, and Cape Breton. This is a trip that is well worth a lot of planning before you depart because you want to enjoy it, see everything and the people are so friendly and inviting. I am planning on going back next year, and now that I know how much they have to see and do, I will be a little more prepared and hopefully without losing my job this time around, last boss didn't like my 3 week holiday turning into 7 weeks, lol. Have a great one and a safe one.