As for those advocating that you not use a WD hitch at all as you have a stout truck....
I have been towing with 1 ton crewcab long bed dually diesels since 2000. I can tell the difference in handling that a single washer or chain link makes in a lashup.
I like my lashups the best they can be... Not just good enough.
There have been some occasions when I was glad I did not settle for less.
So although your truck may be capable of towing without a WD hitch, it will be better with one.
Others may have different expectations as to what is acceptable.. It is a free country. YMMV