I tow my TT on the Coquihalla a couple times a year and it's not an easy drive, but the majority of these major accidents happen because of speeding...coming in too fast into a corner and then braking to hard in the corner. I would never recommend this route to anyone in the winter while towing, it gets lots of snow..
TT: 2015 Jayco Jayflight 26BH Elite
TV: 2014 Ram 1500 Sport, 5.7 HEMI 3.21, Firestone 1000# air suspension. WD hitch w/800# bars
SOLD: 2012 Jayco J-series 1007