You can bypass High Dive and Upchuck. You cannot bypass White Knuckle Hill. It is a very steep series of ledges finishing with a final ledge with a significant straight drop down. An FJ40 will get a strap around the back bumper with 10 guys holding on to keep the back end from going over. Longer wheel base vehicles won't have the same problem, but it is still terror-inducing the first time you run it. I have some pictures -- I will seek them out.
It's a really fun trail, but don't be fooled into thinking it's easy. It's a difficult trail.