having never been, and with no desire to go, sort of takes it out of my thinking.. :)

Whaaa? C'mon, dontcha wanna see tundra and whales and polar bears? They have specially desgined vehicles in Churchill, Manitoba (on Hudson Bay) to take tourists out to see polar bears, so that if the polar bear gets it into his head that he wants to attack the vehicle he won't be able to harm it. And the reason you had trouble with roads, jo, is that there aren't any to Churchill. You have to take the train, or a plane. And for a community on James Bay, try Moosonee, Ontario (according to my 1985 MacMillan School Atlas).

There used to be a fact sheet on Canadian superlatives which I suspect would have listed the farthest place in Canada from any ocean. But I can't find it right now.