I'm doing a trip from Norcal to the KTM rally in South Dakota in August. Trying to take as much dirt as possible and still keep reasonable time. So far it looks easy enough from Reno across Nevada, but when we get to Idaho, it looks tougher. Like we will need to take a highway north as far as Boise or so in order to go East through the Sawtooth NF. Is is possible to get to, say Atlanta, from Boise off road?