Meme,
We have traveled to Alaska via motorcoach twice since 2004. We took the Alcan Highway and had no problems. We kept to the major highways in Alaska never veering off to Top of the World Highway and other gravel surfaces. Of course on the Alcan Hwy there were some portions where they were repairing which is normal after the winter. But we drove the speed limit, slowed down when we saw warnings of frost heaves (bumps or broken surfaces caused by cold weather). We had a great trip both times In '04 we toured & fished. '07 was mainly a fishing trip. Get the Milepost, current edition, and it gives step by step directions on sites and road conditions. Hope you decide to go and have fun.
cluney