We are currently in Alaska. Have been here 7 weeks. Found the roads through Canada and in Alaska to be in fair to good condition. We are driving a 40' motorhome with a tow. This is our 3rd trip. In my opinion the roads are better than a lot of the interstates in the lower 48.
Again, in my opinion, if you are driving to Alaska it is to see the scenery and animals. Just take it easy and there are no problems with the roads.
The "Top of the World" highway was a bit dusty when we came over it in early June.