Dual cam VS Equalizer...I have both

dodge guy wrote:
---Let go of the log in the ditch half way up and it will go back to the bottom.---

I said dragging, not rolling. and yes a log will slide back down just like the DC will.--

Okay, your log is not rolling down the slope.
However, the log will not necessarily slide back down the slope just because you let go of it.
Whether the log will slide down the slope depends on the angle of the slope and the coefficient of friction between log and slope.
If the coefficient of friction is less than the tangent of the slope angle, the log will slide.
For a 30 degree slope, the coefficient of friction must be greater than 0.58 to prevent sliding.

- and yes the friction increases as the WD bar slides up out of the cam, but it is also being forced back down by the same friction.

Not sure I'm with you on this one.
If the trailer tries to swing away from its centered position, the cam will move away from the center of the detent.
The cam is trying to slide along the slope of the bar and the friction between cam and bar is trying to prevent that sliding.
That friction force exerts a downward component of force on the bar, increasing the normal force between cam and bar which further increases the friction force.

If the trailer tries to swing back toward its centered position, the cam will try to move toward the center of the detent.
The cam is trying to slide along the slope of the bar and the friction between cam and bar is trying to prevent that sliding.
In this case, the friction force exerts an upward component of force on the bar, decreasing the normal force between cam and bar which decreases the friction force.
The friction resistance against returning to center will be less that the resistance against swinging away from center.

Ron