Here is what I would do.......
Since you've already had a 3000 mile and a 2000 mile trip and of course the trailer did come from Jayco( which is in Middlebury) to where you are now.....and you have had zero issues with it ,the tires are not wearing, its not pulling strange --anything along that line.:h
I would immediately hitch it up and tow it to Elkhart Indiana( which is only a few miles from where it was made )....and I would go to the Mor- Ryde Service Center--and I would tell them to put on the fanciest suspension system that they have---- cost is no object (because you really want it to be right) fanciest suspension system they have...Laser level it,steel plate...Whole Nine Yards.:S
(And first time you use it...99% chance the condition will still be present with spacing):W
OR....................since you have had it 6 years you say ----taking the 2000 and 3000 mile trip and have absolutely no issues ----then there's nothing wrong with it.:R
Up to you !!!
(Please let us know the results...whatever you do)