Well we're planning to return in 2015 and hope to have Joe's luck.
Further observations: Canada does not sweep the rocks off of the Alaskan Highway and this is very very apparent in the Rockies. We did see sweepers in Alaska. The people that drive to fast are generally the locals and the lower 48 visitors. The visitors don't know any better. I believe that for the locals the road conditions are just a given. The best drivers were the big rigs. They consistently pulled as far to the right as possible.
In Whitehorse I talked to 3 CG neighbors that had MH windshield damage. Two required replacement. One got 3 rocks and 2 of those remained imbedded. We also estimated that close to 50% of the local cars/trucks had broken windshields.
In Whitehorse we had 3 star chips repaired in the toad windshield. We left with the windshield covered and it was toast when we stopped. Apparently there was a 4th star chip.
Vehicle design is a factor. Several people with a jeep had minimum paint damage. Since our CRV is lower that is a factor.
Even after removing the rear solid mudflap in Whitehorse we continued to find rocks on the toad including even a few on the roof.
Some/many had no significant rock damage. Since my very high priced MH windshield survived you can put me in that category.
A fellow camper excited about the view in Valdez and hit our parked MH mirror. With a fiberglass crack the estimate is $3K+. But at least it wasn't a rock.