We also tow with PSD Excursion (2000), 2009 All American Toy Hauler, two quads, 100 g water, 30 gallons of gas on camper and 44 g of deisel. I weighed the complete package 20k+.
I added air bags to the rear suspension, and use Equalizer (1400) WD hitch. Specs list 1,508 lbs tounge weight and 13,500 GVWR.
Obviously, if correct, I am over the listed capacities for the Excursion. I have had no issues except I blew a load range E tire on the camper, I suspect that the GVWR was to close to the load rating. I have replaced the camper tires with load range G to hopefully prevent future tire failure.
I do inspect the hitch regularly and have seen no ill effects.