Swivel hitch, I used one and it flipped my trailer over on it's top. BUT, MGM staid upright and I was able to bring him to a halt with damage only to the trailer........
Chains: I added a holder that I bought at the Trailer hitch company here in town. Yup, if is Chrome and also holds my bell.

The step down is now gone, no more Bushtec Trailer, but the loop with a hole in it is now on the top ball for my chains, be sure and criss-cross the chains under the tongue. That will keep it from dropping to the pavement and doing an end over end on ya, should the receiver come lose from the ball.....