Towing 9K pound loaded trailer with Ram 2500

I've known people who are right around 10% and have sway issues. At 10% it's hit and miss. I see this as the cause of a lot of folks buying a lot of extra anti-sway equipment.

at that point it becomes mechanical issues not loading.  alignment, tow vehicle just to light for the rv, towing with the front of the rv to high, and so on, or its cross wind and now sway at all.  yes shooting a little over is fine also, but weight moving is really a small change unless its a large weight from one end to the other.  we can make hypotheticals all day, the recommended trailer loading by every manufacture has always been 10% front, yes as a minimum.  exceeding that if you don't have any sway is pointless and even if you do encounter sway at 10% it will be very, very minor and most won't even notice it.. the sway we are talking about removing is from a 0% to -% hitch weight. 

I had to move a small trailer once that I had to push the hitch down to hook it up that was a ugly slow ride. 

then my first camper in the early 80's was a old chalet style tent trailer, it was pretty much a neutral weight and the first trip with my 77 Camaro tow vehicle (haha) was pretty ugly but I added weight by putting an extra propane tank and moving the batteries from inside to the a frame and it calmed it down at about 8% weight.  10% is generally considered the "safe %" but yes if you have other issues going on you may need more.  but stating to go to 15% right off the bat isn't realistic as a lot of units will never get there unless you buy a 400 lb generator and put it up front.  most water tanks are right beside the axels so weather they are full or empty is a minimal change.  my 5th for example the fresh water tank is a little more forward the black and main grey are right at the axel and the second grey is just a little behind it so the fresh is the only one that changes anything and it isn't that much, I think I get about a 1 or 2% change from all front tanks full and rear empty to the other way around.  

also it may cause some one to have to buy a new truck they didn't have to.  I agree if you are buying a new truck anyways buy the biggest that will work for you, but if you already have the truck if you stay in that 10% hitch weight then you should be fine.  if not and you have a slight sway then it could be wind like I mentioned, an alignment issue, a leveling issue or such.. yes a sway control will take care of these issues but  aside from he wind the others can be fixed.  I have never used sway control myself..  I think people jump off the deep end and get it when most of the time it is the gusting side winds or uneven roads causing the feeling of sway.