jorn,
If you are going to be on twisty, poor roads for any length of time, disconnect one side of your rear anti sway bar and tie it up with wire. This is an old jeepers trick and works for me. The suspension, not the frame, will flex more that way. If you have air bags, lower the pressure down below 10 pounds to be out of the picture. Too much recoil or rebound. Also, lower the pressure on the tires if moving slowly enough. Try 40 pounds down to 30 pounds if on a rough road going less than 25 mph, checking the heat on the tires occasionally to make sure they do not get too hot. I'm constantly fiddling with tire pressure and have a large CO2 tank to get the tires back up quickly when hitting the pavement. This works especially well on wash board or any time you are in a frame twisting mode. loosening the tie downs will help you keep from pulling your camper apart on frame bending ruts. Loosen the rears more than the fronts. I know this is counterintuitive, but it takes the pressure off your tie downs. Be sure you have some sort of camper guides: 4 brackets that 'hold' the camper box from slipping around in the bed. Always attack a deep ditch head on at a 90 deg. angle. This will keep the frame straight.Of course, then you need to have a good approach angle, breaker angle and departure angle so as not to drag or scrape anything, or God forbid high center the beast..
During Holy Week, my bro John and I will be in Death Valley plying all the jeep trails with our truck campers. We will, I'm sure use all the above tricks of the trade.
jefe