THe hitch and dogs don't account for th trailers tongue weight! That goes against he vehicles GVWR. Anything you put in the trailer goes against its GVWR. The tongue weight will be dependent on how you load the trailer. If you put 1500lbs directly over the trailer axles the tongue weight will not change from its dry weight! Now when you start moving that around the tongue weight will change. But in the end you want the final tongue weight to be 12-13% of the trailers loaded ready to travel weight. And there is only one way to know that. Load it up as you would for a trip and go weigh it. Move stuff around until you arrive at the proper weight.
