In Holland I'd recommend Groesbeek cemetery near Nijmagen. It's the largest Canadian cemetery in Holland. As far as France and Belgium go, the sheer number of cemeteries means you should probably prioritize them. Do you have a particular unit in mind? That unit may have many more troops buried at one cemetery than at any other. Maybe your more interested in battles, like say Dieppe, the Somme, Ypres, etc. If that is the case, I would find out, from those links listed, where the majority of Canadians are buried from those battles. If your looking for ease of travel to and from major centres, refer to a good road map of Belgium and France, and go from there.
I would probably try and limit the number of cemeteries you visit. With all due respect, they do kinda look the same after a while. What distinguishes them from each other is largely a personal matter, IMHO. I, for instance, found the Moro River Cemetery quite moving, due to the sheer number of Seaforths buried there. I also know a fair amount (relatively speaking) about the battles that necessitated that cemetery, which added significance for me. Find out what motivates you, and base your choices on that.
Lastly, bring along some Canadian flags - the ones with the wooden mini flag poles. They work well for placing them graves. I got a huge stack from my local Immigration Office. Check around. You should be able to get them free of cost, once you tell them what they're for.
God luck.