We made the trip last summer pulling our Windjammer trailer. No problems encountered. The Alaska Highway was better than I was led to believe from talking with others that have made the trip. The road was paved for the entire length but you do need to watch for holes, bumps made from filling holes, and the frost heaves. The worst section was the last 200 miles before the Alaska border. I kept the speed down to about 40 mph so I could enjoy the scenery and keep an eye out for any damaged sections of road.
The best advice I received about avoiding vehicle damage was to stop for oncoming trucks if you are on a gravel section of road under repair. That way you do not have any forward speed if the truck throws any gravel in your lane. We did not get hit by anything and had no damage to the truck or trailer while on the trip.
Take it slow and enjoy yourselves as it is a great trip.
