A TH usually has a higher pin wt. That is about 25%, where many FWs are closer to 20%. No, that TH pin will not get lighter with toys, as the normal load will be toward the front.
With a FW, nearly all weight will be on your rear axle, so that is the most important rating. The newer GM 2500s have a higher RAWR than earlier years. If you loaded your truck, ready to go, with everything in it, including passengers, and full fuel, checked separate axle wts, you would know what you have left for pin wt, plus about 175 lbs for the hitch.
Let's guess your weighed rear axle is 3K, and your RAWR is 6,600. You will be close to maxed out, with that trailer.
Jerry
