I actually welded up three receivers with a piece of channel iron across the back of my last 5th wheel that were tied into the frame. Used it to carry lightweight dirt bike back there. BUT it doesn't make much difference how strong you make it the bouncing is more associated with the location being all the way at the back end of the trailer. Independent suspension is about the only thing that will actually help I would think.
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys