Most solid way mount bikes while off-roading?

Any chance you can take some close up pictures of how it is mounted to the bed rails?

 

I don't have any at the moment but look up softopper website they have plenty

 

I use a Kuat dirtbag bolted down somewhere solid and then bungee the rear tire down. It is rock solid.

I've used a Yakima High Roller and actually stopped and threw my bike in the bed since it was moving around so much on washboard roads that I thought it was going to fly off

 

Yeah that is what I am concerned about. Seems like the fork mount bike carriers maybe more solid for moderate off road trail driving?