Pacific NW/AK/BC winter vacation, where?

[Castle Dave]

Google maps says just under 500 miles crossing border at Sumas. You'd want to time going through Seattle to avoid commute traffic and note that this route includes Coquihalla Highway which received a lot of damage last Nov. It's supposed to be permanently repaired by the end of this year.

I drove the Coquihalla a few weeks ago and it's fine with just some construction zones and no real delays. No biggy.