I’m local and having been riding last year’s course alot recently. Its been super fast and great fun. No idea if they plan on making any changes to the course for this year, but i’m sure whatever they do it will be good.
The course is tight so if your bars are wider than 700mm take care.
Niner Air Nine is perfect bike choice. I’m on a 29er Stumpy and it loves to rail those singletrack trails. If its dry tyre choice would be Ikons, Crossmark or Ralphs.
The first half of the course is the real lung-buster in my opinion. The climbs are short and sharp, with the final climb up “badgers” to the road being the one that sorts men from boys. After that its all good with some lovely singletrack sections.
As said above if it rains alot it will be hell. Not sure riding SS will help much as the climbs are steep and rooty so you struggle for traction, but less probs with stuck gears etc.
If you are in a pair / team take a bike washer or something at least to clean up your drivetrain between laps.