If that little bit of gravel on Bear Tooth gave you concern you better forget Alaska. I'm sure the bike can handle it as someone did it already, maybe try something else shorter first. I did Moki Dugway without trouble a while back, both up and back down. https://www.youtube.com/watch?v=uiC3UYkUKH8&t=14s
Was there much of the deep, soft gravel which wants to make your front tire sink in and push sideways if you know what I mean? Can't really tell from the video.
"Extremism in the defense of liberty is no vice.
And... moderation in the pursuit of justice is no virtue.''
-- Barry Goldwater, Acceptance Speech at the Republican Convention; 1964