I would actually weight the loaded trailer and determine its tongue weight.
If the loaded trailer is 10,000#, then it's tongue weight should be at least 1200# (12%), to reduce sway. Perhaps some weight re-distribution within the trailer will help with this.
Your 1000# WDH will not be enough, possibly 1400#.
2014 ORV Timber Ridge 240RKS,8500#,1250# tongue,44K miles
690W Rooftop + 340W Portable Solar,4 GC2s,215Ah@24V
2016 Ram 2500 4x4 RgCab CTD,2507# payload,10.8 mpgUS tow