Another vote for a chain between the top of the mower, and (in my case) the Quick Hitch.
Down in the back of my orchard, the rows are terraces. Cross-mowing requires climbing or descending substantial grades between rows. A chain replacing the pivoting top connector on the mower, allows the slack needed to maintain full weight on the tractor's rear tires.
As noted above a change in grade with a too-tight link can leave the tractor hanging from only the front tires and the mower tailwheel. I first noted this with the 2wd YM240, when I slid downhill uncontrollably, partly sideways, for a couple of feet. The tractor rear tires with brakes didn't have enough weight for traction.
The chain is needed only for lifting the mower at tight turns. It's slack nearly all the time.
Careful adjustment of the 3-point lowering limit will limit scalping. I figure anything that gets scalped needed to be made more level anyway.
The chain is barely visible in this photo. It is looped over the top of the QH.
Santa for your rough ground I recommend this solution.