Can you better define the jerking? Is it fore/aft jerking as if the engine can't maintain constant power? Is the truck bouncing up and down at the hitch? Is there much bounce in the trailer? Is there left/right jerking? Newer or older F150? What tire pressure are you running on the TT and truck? Have you got the TT level to slightly nose down? Have you got the correct amount of weight transferred onto the steer axle? What spring bar rating and what brand/type is the WDH? Is there excessive hitch play? Is it a new/newer TT? Or maybe it's a combination of above factors? Have you been to a scale to see what actual weights are fully loaded up for camping?