Originally Posted by snrusnak
Yeah well lighter loads are less dangerous for hopefully obvious reasons. Trailer sway is not only caused by poor load distribution though; the amount of torque(sway) that the trailer puts about the pivot point (the ball) increase as the trailer axle(s) get further from the ball and the trailer plus load weight gets heavier. Velocity only makes sway worse from road forces...
I speak from my personal experience and my comments apply to my particular setup for my driving ability. My trailer is 14ft overall, around 1800lbs with all the weight loaded very low.