If you are looking for a good place to do this I would recommend The Thousand Islands. Put in near Gananoque, Ontario. It's a great place to paddle and there are hundreds of wrecks in the area. I have done this trip many times and would do it again, but this summer is no good for I am paddling the Rideau Canal Waterway.
Check out this site:
http://www.paddle1000.com/
and this site:
http://www.1000-islands.com/diving/
Good luck and paddle/dive safe..
Baidarka