Get a proper tow bar setup, bolted to at least by 4-6 large bolts to the under chassis - do not rely on that piddly little thing!
When I booght my Troll second hand it had the towbar but was attached to chassis with 4 M12 bolts, which would never have carried my boat!!
I drilled another 2 ie 3 each side, and put in much bigger bolts. I also inserted a 4mm flat bar into the chassis tubing with 3 aligned holes for extra strength.
I tow really heavy equipment and since have never had the proverbial K_K