The main thing is slow down when you get in the gravel areas or areas with frost heaves. You'll see people driving like mad to get to Alaska and they miss all of the great sights in Canada.
If you drive to fast and bust something, you'll have to wait for repairs as all of the repair places are full waiting for parts to fix everyone else who drove too fast.
If you get a chip in your windshield it's relatively easy to get it fixed. In most campgrounds in the evening there will be someone driving around that does repairs.
Bill