I'm planning on a roadtrip holiday this December from SF to San Diego and back. I'm going to take the coastal highway 1 to San Diego, staying overnight at Monterey/Carmel, and possibly San Luis Obispo. On the way back I was thinking of taking a different route, I-5, highway 99 to Fresno and on to highway 49 to the Gold Country, spending a few nights along the way.
My question is, will it be a challenging drive due to snow? I'm renting an AWD Audi Q7 but it doesn't come with winter tires. And I never installed tire chains before. Will I require those for the route?