We just made the trip to Alaska last week. We came north on 97 through Prince George to route 1 into Watson Lake then into Alaska. Road had several frost heaves but were well marked with red flags and proper markings throughout Canada. Slow goings from Haines Junction to the Alaska border. ( 5 mph - 10 mph for hours) Due to the frost heaves and overall poor conditions of the asphalt. We took our time and had no problems. I am here in Alaska now parked next to a gentlemen who traveled here about the same time and traveled the Cassiar Highway and said that it was horrible. He broke several items within his coach and was "Crawling" due to the poor conditions. He even said that he will either sell his 5th wheel here in Alaska or ferry it back vs. driving the Cassiar again. This is early yet in the season and the frost heaves will settle a bit. I would not hesitate to do it again, just take it slow over the rough sections. I was pulling a fully stocked 3400RL with a 2500HD Duramax. Drive within your comfort level and you will be fine. One of the best road trips in the country. IMHO