I put ours on the rack on the back of the Dually all the time.
Too high to lift up into bed and then when you do there's that dumb looking thing right in the middle that gets in the way .....
Do get some strange looks at times though.
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Vaughan & Tracy 2013 RW 36RL, 2013 F350 DRW CC, 2016 Focus. MorRyde IS, MorRyde pinbox, disc brakes, Comfort Ride Hitch. "Life is to be embraced, Grab it with both arms ! "