First time poster here -- you all have a wonderful site!
So my fiance, our 5 year old golden retriever and 4 month old golden pup are taking a road trip from Phoenix to Seattle during the last two weeks in December, in our 96 Cherokee (v4, not v6). We've made a similar trip from San Diego to Seattle before...but during the summer.
My goal is to find the safest and most efficient road possible. We have several people to visit with along the way so we're more concerned with getting there quickly and in one piece than with the scenery along the way.
Our main stops on the way north would be Victorville, Santa Rosa, and arriving in Seattle. We are open to traveling back south via a different route through Boise and Las Vegas, but perhaps this is madness as this brings us through mountains. Any advice as to the best route, or highways to avoid, would be much appreciated! And any dog-centric tips are welcome, too.