The links below are three yacht clubs in Nova Scotia that can probably give you better information than most of us here. I think you'll find them to be pretty helpful folks.
When I was sailing there, we used to buy our
charts at the Government Bookstore on Hollis Street, not sure if it's still there or if there are better
charts available, but I think that the locals will be able to help you.
http://www.armdaleyachtclub.ns.ca/
http://www.rnsys.com/
http://www.cyc.ns.ca/