I use the camper struts and like them. They are not a fix-all. My whole rig tends to wobble more if I don't use them. They don't really 'hold' anything, but rather reduce the shock loading and movement just like a ....shock. Everything goes into slow-mo.I bought them in 2002 and feel naked without them. They are kind of like a girdle. Everything that can wobble stays in check.
Inspect the four, 3/8" bolts holding your bed to the truck frame. My passenger front bolt pulled through the bracket/mount and the bed was actually rocking on the frame for a short time until I discovered the culprit.
I used higher strength bolts this time all around and thick, wide fender washers so the bolts would not pull through. Not too tight though. A little give using locknuts or double nuts may help on rough roads. One of the hazards of a twisty frame.
jefe