As many folks mentioned above, I too would hit the scales and "scale weight" your average loaded trailer - as if going on a normal trip. I'd also scale weight from side to side - to ensure onboard items is properly balanced (inside the TT) as well.
With scale weight numbers, I would also compare to RV's GVWR number. This is the max lbs (trailer and onboard cargo) the TT is rated for. If one cannot find this number on the VIN tag, google search can often find / confirm this critical number as well.
If "scale weight" is under GVWR's number, it means the trailer is NOT over loaded - which is a great thing. If overloaded, then reduce onboard cargo weight to get trailer's weight under GVWR's number. This is the 1st step.
If trailer is still leaning (and being under GVWR's number), I would then compare "side by side" scale weight numbers against the existing leaf spring pack rating numbers. If needed, re-load internal items to be better balanced (to improve side by side numbers)..
Unknown to many folks, RV factories /5 or -13% (average tongue weight) to calculate minimum leaf spring pack size. Legal but not good in the real world. If it were my trailer, I would then replace leaf spring packs with +1 size higher (rounded up). For example... Let's say GVWR's number is 9,995 lbs, I would take 9,995/4 = 2,500. I would then install +1 size up 2,600 lbs leaf spring packs. (or, next available higher size). Going +1 size up doesn't mean one can load above RV's GVWR number. It means one is adding more load buffer - when one doesn't properly balance internal cargo storage. Or, when going across double railways tracks too fast.
If wondering, all my trailers (boat, utility, RV) have +1 higher leaf spring packs (after "scale weight" tasks for proper loading). Never had problems afterwards....