Serious Trailer Sway at Times

I recall one of the members had truck and switched from a Hensley to a PullRite, which moves the actual pivot point to up near the rear axle. Should make it tow like a 5th wheel, just as stable. At some point they had a generator on their rear trailer bumper and the tongue weight was down at 11% or less if I recall. At that point he started to feel the trailer want to sway, it is less stable with too little tongue weight regardless of the vehicle/hitch's ability to control it. You need to keep 10% as a minimum, no superior hitch will make it completely stable if the trailer wants to sway. The better hitches will drastically improve things, but won't fix an unstable trailer. I would keep your tongue weight at 1,000 lbs if you can. If filling the front water tank is the easiest way to do it, I'd do that since it is more convenient than storing stuff in places you don't want. Try to store light items in the rear as much as possible.