Iam planning to bring my family to seattle to spend new year with my cousins there, Then we will drive from seattle to Rexburg ID, to drop my son for college, then from Idaho back to Chicago. How is the general road conditions during those winter month? is it safe to travel? will there be a lot of mountain to travel/slippery road? . Is there a scenic route to take? is it safe to drive at night? Is there a fast and scenic route? I read a blog about that route but it was way back 2004, and i dont know if that was done during the winter. what can you recommend the best food stop along the way.