I would get all the stuff off the rear of the trailer and put it in the bed of the truck - generator, bikes, all of it. It does not matter if the rear of your truck squats a bit. That is the way it is supposed to be when you put a load in there or hang one on 4 feet behind the axles. Use the WD to restore the weight lost off the front axle. If that raises the rear (which it will a bit) then fine but the rear will take care of itself if the front is correct.
I would also tilt the hitch head rearward a bit and continue to use the 5 links. That is the minimum amount you want to use. More is ok if you get the WD you need. It sounds like you have it very close right now but the only thing that is really needed is to get the weight off the rear of the trailer. That will improve your tongue weight and most likely give you a nice towing trailer.
I never tow above 65mph. That is the speed limit that is on the side of my tires and is also a comfortable speed to tow at.
Get that weight off the rear and when you have the time install the friction sway control. It is not for the small wiggles you feel when a truck passes you - that will happen no matter what hitch or sway control you have - but is for those emergency times when something goes wrong and you really need it like coming down a hill on the expressway, passing a truck on a curve, and need to brake bit to slow down. That is perhaps the most dangerous situation I can think of to induce sway. The sway control may save you rig and perhaps your life in that situation.
Barney
