We went in early September with no reservations and couldn't get in to Tunnel Mountain for hookups. We had a much smaller unit then than we do now, but we could still get into those spots now. Here's a link of our trip and a picture of some of the places we stayed. You could definitely fit in Lake Louise as there were Class A's of the same length there. You'll fit in Tunnel Mountain if you can get a reservation and you can get into Whistlers, as you will see by the site we had.
Link to information on our trip.
