We ferried a Maule from Palmer, AK to California last spring, so our recommendations were rather snow covered then, but websites we found really helpful included the Cirris Owners & Pilots Association -
http://cirruspilots.org/public/alaska/index.htm. They have an annual fly-out through Canada to Alaska and on to Russia! Anyway, their website was full of really helpful info about weather and safer routes to take.
For myself, I really liked Whitehorse, Yukon. The hotel we stayed in had fantastic food, and the town looked like it would have been fun to explore, so went on my list of places to go back to when its not the coldest St Patricks night since records began.
I'd go back up that way in a heartbeat, with my aeroplane, my tent, my dog and my husband and spend weeks exploring all round the Northwest Territories and Alaska. Stunning scenery and wonderful wilderness.
Sorry I don't have more useful info to offer, but I hope you have a fantastic trip.