I always get a kick out the comments about not being able to stop it. The trailer has brakes on it that compensate for the overall added weight. When pulling my 18' flatbed trailer that is around 9,500 lbs. back in the day (before the inertia based brake controllers that deliver variable force) I had to turn the trailer brakes down in town so it wouldn't snap your neck when stopping. Besides, why would a Power Wagon be any different in stopping versus a non-PW 2500 that is rated to tow upwards of 16k lbs.
Anyway, back to the original question. I will start with saying the PW is rated from the factory with a significantly lower towing capacity than a non-PW 2500. That is mainly because of the softer springs and D-rated tires......everything else is exactly the same. You can modify the PW to take care of those issues (air bags, springs, tires, etc...) but "legally" you cannot raise the factory towing capacity. A non-PW 2500 can have a factory tow rating up in the 16k range so with the right modifications not sure why a PW couldn't have the same capabilities. Again, to keep the "payload police" happy and those who will say it will blow up and kill a bus full of nuns legally the rating will not increase. Though I would like to know how many times a non-commercial private citizen cruising down the freeway gets pulled over in their pickup truck pulling a camper by the highway patrol and they check the weights........
From my experience any type of trailer that is either a gooseneck or 5th wheel pulls better than a bumper hitch version of equivalent weight and overall size. That is because the weight is distributed on top of the axle of the truck and not leveraging off the back.
For my final comment I will say that if you plan on pulling that size camper on a regular basis and for longer distances I would consider a different truck (i.e. non-PW diesel).