Most boats reach Lake Ontario
via Oswego, although they come by water
not road, but the facilities exist in Oswego because it's a popular cruising route
. I would check marinas
there first. You don't really say where you are coming from, the lake I fairly long, and depending where you're coming from, shipping
costs will be less at one end then the other.
Georgian Bay is very nice cruising, but Lake Ontario
has plenty to offer too, Bay of Quinte, Thousand Islands, Niagara River, Toronto are all great cruising destinations.