What is a fish an ski, I’m assuming a boat or watercraft?
What is the weight of it?
With a DRW, I would consider a 9-10’ TC with a slide out and use a hitch extension like the Torklift Supertruss or Reese Titan depending on the weight.
With a TC like the Lance 981 or Arctic Fox 990, (both 9’11”) you could probably get by with a 24” extension and have a camper with much more room, built in generator and larger holding tanks.
I had a Dodge DRW and Lance 981 and loved it. Not too big and heavy but very comfortable and drove great with the dually.
I plan to go back to that setup soon.
Nice find on the 7.3.