Looking for advice on the best route from SW FL to Seattle. My family and I are convoying with a F-150 hauling a motorcycle in the bed and trailering the other bike. We will also have a 27' UHaul towing my Honda Element. We are looking to the best route thatcan provide the best fuel economy and least trying on our vehicles. It was suggested to stay south and come up through CA. OR and through to Seattle. Our original thoughts were to go on through to Chyenne and then either cut over to Salt Lake to Boisie through Walla Walla, Yakamia and over Snoqulami. Or would it be best to go further north before cutting West which takes us through Montana. We want to keep interstate all the way.
Please, if any seasoned trippers can provide some insight-your expierence is most appreciated! Thank you!