Wreckman, I'm probably going to pass you along the way going in the other direction... Leaving Alaska for Texas at the end of June... and returning the last week in July.
From talking with those up here that have just recently driven/ridden the Alaska Highway, they tell me they only encountered a few small stretches of the nasty contruction areas in their 4 days in Canada.
I've driven the route several times in my Suburban and/or Tahoe and these sections call be navigated easily on a bike... if you pay attention and don't get in too much of a rush to get out of it.
The most common mishap you may find in these sections would be after you get out, and all of the stones that get trapped in the cage's tires in front of you start throwing them at you once you start getting back up to speed.
Almost everytime you approach one of these sections, you will have had quite a bit of warning, and you normally have to follow a 'pilot car'.
Granted, there will be some areas of the pavement that have pretty nice pot-holes in them, but with a keen eye, and ever alert posture, even these can be negotiated without much worry.
If you see a warning sign that simply says "Bump", don't expect it to be placed several hundred feet before the bump... it is usually placed right there at it. Makes for difficult seat adjustment if caught at highway speeds.
Also, you will probably have to deal with some wildlife (in the large variety) somewhere along the trip. Either running across in front of you, or simple taking a leisurely stroll along or across the road. And, Bison/Buffalo are not as docile as they appear... nor do they like to get off the road when it matters most. If you spend too much time near them, they will ram your vehicle... and being that you will be on you bike, you stand a pretty good chance at getting hurt.
Have Fun, but ride as if your life depended on it... as it most certainly does to your family and friends.
