Well the trip got heavily modified while watching the weather almost hourly for a few days leading up to this trip. Scratched the Lake Louise part, dropped a day, and ended up doing an overnight to Nelson and back Monday along the 3.
It's been at least 10 years since I had done a ride with temps and weather that harsh, but we did it. Temps hovered between 9C and 13C, and two passes got as low as 5C, with one where the fog was so bad we had to slow to 80km/hr.
Roads were wet 25% of the time, it rained on us a total of 45mins on day 1, and 50% on day 2. Rain gear kept me warm and dry the whole time (never took it off).
No bugs, no cops, no traffic, good hotel in Nelson (The Adventure) and great food at Mikes Pub.