Payload: 1,658 LBS
Balance for towing: 9,542 LBS
Total towing Capacity: 11,200 LBS
Does the payload include the pin weight? We would not be carrying much within the cab itself and nothing in the bed except the fifth wheel hitch.
Yes, it includes the pin weight, hitch weight, people, dogs, tools, bbq, bicycles, kayaks, firewood, etc. To be on the safe side use full gross vehicle weight of the fifth (10,000 pounds) for your calculations. Pin would be 2000+/- pounds and the hitch around 200 more. We always carry more stuff than we think we are carrying and I would be surprised if you carried less than 1500 pounds including water and options.
I am surprised that the payload is only 1658 pounds unless another 600 has automatically been deducted for the passenger seats. Most 2500's have a payload in the mid 2500 pounds or more range. Even at that 2268 pounds payload seems a little low for a 2500. What does the placard on the door state the payload is?
There are people that tow more fifth wheel weight with a 2500 than you are considering so it is up to you what you feel comfortable with. Others justify being a little over payload and gvwr for the truck by staying under the axle ratings especially the rear axle, wheel and tire ratings.