The weather forecast for Whitehorse, Haines Junction, and Beaver Creek are all a little above freezing through the week so the roads should be mostly clear of snow and ice.
You may want to start a thread in the 'Canada' forum on here to hook up with others while you're in Vancouver.
Keep an eye out for Sjaak Lucassen heading down the other direction in a few days. He's in Beaver Creek right now. I've posted a pic below of his unique ride.
Good luck and have fun, Mark H.