IMO you should stay away from the pea grave because it tracks like cinder rock.
Road mix, 3/4 washed or remove the tires and set the unit on cribbing or blocks.
With the tires off and the unit sitting solid you will have no bounce.
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping