I think I'm down for this run. Did this a few months ago with a bunch of jeep guys. Got a Frontier and an X w/titan swap, 33's and rear locker up through it unscathed with some careful spotting an some rock stacking. There were definitely spots where if the wheels slip, you could get into trouble. I'd love to try it out with the front locker now. I could definitely have used the front locker on Holcomb Creek, I found that a tougher trail although it could have because it was a bit snowy and muddy when I did it.
This is from John Bull:
And this is the beginnin of Holcomb Creek: