All those specs are from a brochure or web site. They are not as equipped payload. Your tow rating is over 8000 pounds, but you will likely be limited to less than that for either a TT or 5er. Open driver door and locate this sticker. Note what you for payload have where mine says 2051:

Take that number, subtract the weight of whatever else you plan to put in the cab or bed. For 5th wheel, you'll also have 150-250 pound receiver. What is left is available for TT tongue weight or 5th wheel pin weight. Let's say you have 1400 pounds of payload. You and family weigh 400 pounds, and another 200 pounds of camping gear/firewood in the bed. That leaves 800 pounds for trailer tongue weight, or 600 for 5th wheel pin weight. 800 pound loaded TW means about 6500 pound loaded TT, or 5500 pounds dry. 600 pound pin weight means
this Scamp would be pushing it.
You your own real payload and estimates for people and cargo.