Replying to Cross-Country Road Trip Suggestions

taking a cross country trip in an old 1981 Jeep CJ-7. I will be starting in the bay area and ending up in Traverse City, MI. as of right now, i have absolutely no clue which way im going. preferably I would like to take smaller roads (not 80 or any of the main ones). i wanna see some cool shit. have never really been between the east coast and the west coast. looking for suggestions on which way to take or any cool stuff i should check out on the way to michigan. +k for advice :)