Tom – Think what you mention is the Canadian cemetery along the old N9 road to Ghent some 20km east of Bruges, but there is no bus stop nearby as far as I know so hard to get there.
It would be easy if there was a big museum about The Battle of the Scheldt north of Bruges, the battle that made the vital seaport of Antwerp operational. But reality is there are only a bunch of smaller private museums who are not so easy to reach from Bruges with public transport. The Canadian government is willing to pay more attention to this battle but I think there is a long way to go before a serious museum or memorial will de realised.
As Tim already remarks, the only serious museum in the neigbourhood about WWII is the Atlantik Wall museum in Oostend(e). Just take one of the frequent trains to Oostend(e) railway station and from there the coastal tram to stop Raversijde Domein Raversijde, traveling time about 1 hour. Besides intact bunkers (with complete interiors) and trenches there is also an original Enigma machine to see. At the north side of the harbour there are also remains of the Atlantik Wall but not open to public, you can get there with a free passenger ferry.
There is also a tall ship in Oostend(e) to visit not too far away from the train station.
Really spectacular are the two former V2 bases (La Coupole and Le Blockhaus) around St-Omer in Northern France, but you need a car for that. Think about two hours driving from Bruges to get there.