I have pulled a 5er from Alaska down the Mexico border and as far east as Regina in Canada and AZ and on the south western side of the USA and Yellowstone and Mount Rushmore on the North west side of the USA and found that your hwys are no better than ours. Yes we have frost heaves and pot holes but so does Wash State, BC, Yukon and Alaska.
Time for traveling is measured differently up here in Canada, we measure distance by time between points. Like from My house to my Daughters house in Alberta is 6.5 hrs not pulling the 5er and 7.5 hrs pulling the 5er. Distance from here to Vancouver is 8 hours and so on.
Also if you plan on driving that slow please pull over when safe to do so and let the people driving the speed limits pass you. I always watch for people lining up behind me and pull over then I see a spot to do so. Anythinh we hate in the Mountains are a group of semis and or RVer’s traveling in a group and not allowing faster drivers to pass. The Alaska Hwy is a beautiful drive with a lot of wild life all around it, so when you see something you want to watch pull off the side of the road and put on your right hand signal Light. Putting your flashers on my cause people to pul over as well so assist you when none is needed.
Soup