Hi FCR,
It's possible another BC 3965 owner might have actual weights, but if not, you should plan on the pin weight running around 20% of GVWR. With a GVWR of 16,500 that would put the pin around 3,100 lbs. As for weight on the rear axle, add weight of the hitch, bed liner, bed cover, wood, tools, generators, etc. Compare that all to the truck payload spec as documented on your door sticker.
Of course if you install options like a washer/dryer, on-board generator, and carry a basement full of stuff, you could have a higher pin weight. Our 2011 Landmark dry spec is 2,620 on a GVWR of 16,000. Actual was 3,700 last time we weighed.
GVWR
16,500 lbs
Dry Weight
13,978 lbs
Hitch Weight
2,900 lbs