Apparently lots of other people have had issues with "Trailer Sway"

This interesting article discusses the frequency of u-hauls trailers starting to violently sway back and forth (called "trailer sway") which often causes horrible wrecks. The majority of the causes are incorrect weight distribution, speeding (you are supposed to go 55) and faulty equipment.
Having this happen to us several times on the way out there last year and managing not to crash (somehow!) is still fresh in my mind. We are going to enjoy driving out without a trailer this year!

On that note: Melodie, your trailer looks fine, I think. As a camp, we need the PVC brought out and a playa pluton (which folds up flat). I think we are going to wind up driving and be able to take everything else.