stone stomper ....preferably particularly on the loose stuff you get over there......and in other places, of course.
While I was going to fit a stone stomper, I had a couple of other factors to consider so ended up ordering one from rvpartsexpress ....quite sturdy, and removable as it's got a couple of pins and just lifts off.
Be careful with the width measurement, though. It comes in three sizes and we felt the full size ones "for caravans" was just too wide to allow us to get around it and still lower the bed ends.
We opted for the medium width model and it's quite wide enough for a Jayco.