It appears Timberline Twister and Camp Bus are permanently closed, both attractions are behind walls and have been removed from the Knotts website and app.
Quick update from today
Closed rides.
No movement on Montezooma yet.
Supreme Scream has reopened but only with one tower.
Green Tower
Xcelerator is back open on weekdays (for 4 weeks it was only operating on weekends)
Wipeout has been closed since Sept.
Lastly Log Ride still has a week or two left of refurbishment.
Maybe they decided to keep Montezooma open longer to help with ride capacity
https://www.knotts.com/scheduled-ride-closures
Closed Rides:
High Sierra Ferris Wheel
Pig Pen's Mud Buggies
Wipeout
Supreme Scream
Timber Mountain Log Ride
Xcelerator The Ride®
I was just at Knotts and Xcelerator appears to be down indefinitely, the ride looks abandoned just like Hangtime.
Its also been added on the websites closed rides list
Closed Rides:
HangTime
Pig Pen's Mud Buggies
Wipeout
Xcelerator The Ride®