RE: Bed weight.
Since I bought an ATV trailer and don't really need the bed for anything 99% of the time the fifth isn't attached, I may keep my Curt A25 hitch installed year round. Could use a cover for the head I suppose...
Between the hitch, a crossover box full of chains, tools, straps, etc, it might help tame it some. Then again, I just don't hit those stretches of road much at all and prefer to use the car if the truck isn't needed. If the truck is needed, it's probably then loaded and the issue isn't so present.
Speaking of bounce, my truck has a annoying rear shake/bounce when towing a light trailer on good road. Like really light, like one or two ATV's light. Weird. Since it also pulls right on hard braking, I'm thinking alignment and/or tire balance (would not pull) can't hurt to at least rule those out. I put as much weight as possible on the trailer with a single ATV full forward, the the two together don't weigh but around 1300 wet with a spare tire. Probably only 150 on the tongue. Truck surely doesn't know it's there except for the damn shake.