Are the rear bumpers that have a hitch safe for towing anything. I am considering getting one because I like the looks of a double tube bumper and I want some more protection for the rear of my jeep. My only concern is that they bolt to the flimsy rear crossmember in place of the bumperettes. That crossmember is only attached to the frame by two bolts. Is this going to be safe enough to tow a small trailer with 3-4 dirtbikes?