The airport in Halifax is not near anything, including Halifax. We bought a boat that was in the Chester area and found that it was pretty convenient to take a bus from just outside the marina gate to the Halifax bus station and then another bus to the airport. If you find a suitable marina contact them and ask how one gets to the airport from their location.
Heading back to Lake Ontario for this summer. Now in Bermuda and heading to Long Island Sound in the first week in May. Then on to the Hudson and the Erie Canal.