I can tell there are a lot of amateurs concerning Wash Board Roads.
There is absolutely NOTHING one can do. Slow or Fast... you will shake everything that was not intended to be permanently attached... apart. Over time, of course.
I have driven a 1956
VW at 16 years old and it probably, with the short wheel base, handled WBR (Wash Board Roads) very well. Will not tow an Airstream with the 900cc engine, though.
I now have a F350 Diesel Turbo, double cab, 18 inch Michelins from the factory, strong shocks, great suspension, comfortable seating.
Your eye balls will be shaken from your skull if you are not a patient driver. With or without a trailer in tow. Most steep grades on mountain roads are WBR. ATV's will even enhance the WBR as do cattle haulers and people who drive just to rip some new ruts for those unsuspecting tourists who made an error in judgment.
The trailer hasn't shocks like on my F350. These are for the axles moving and it eases the moving back where the axle is most comforatble... like 30 inches center to center on a double axle.
Off the Grid camping requires some ingenuity. Not guess work or mumbo jumbo cures. Better hardware to secure the interior. If you do not know now, you will find out later which.
Anyone who has traveled serious back roads know. Anyone who says an Airstream is not capable traveling off of new paved Interstates... probably has not done much off the gilded highway travel from RV Park to RV Park.
It does take a learned skill of handling these roads. You are not an idiot or fool to take your Airstream where 90% would wet their drawers once seeing dust in the rear view mirrors.
Our used trailers, when sold were 100% road worthy, NO sign of misuse or damage and were 'upgraded' by common sense and experience. Those who slobber all over themselves about Wally and his wild travels... like to read. Great. It can be done, easily and leave it to those who know what they are doing.
We did a couple of 'Expeditions' in Wyoming and New Mexico. Some handled it without blinking... others needed to laundry their underwear. They left earlier than expected.
As a Wyoming Rancher would say... 'Good Riddance', you are slowing the rest of us down.
Good Riddance (Time of Your Life)
Another turning point, a fork stuck in the road
Time grabs you by the wrist, directs you where to go
So make the best of this test and don't ask why
It's not a question, but a lesson learned in time
It's something unpredictable, but in the end it's right
I hope you had the time of your life
So take the photographs and still frames in your mind
Hang it on a shelf in good health and good time
Tattoos of memories and dead skin on trial
For what it's worth it was worth all the while