Ken:
I had a 2005 17.5 rear bath, I had a hitch made but wound up not using it as the trailer needed more tongue weight to tow correctly and not sway, we had to be careful not to have full water tank as it was parallel and just next to the rear wall. I dont know how much tongue weight you have, but if your
axle is in the same spot as ours was, about 30-40% of added weight on the rear would come off the tongue. Ours liked to porpoise(bounce on ball) if
light on tongue weight. Also I have found that what
Bigfoot reports as total weight isn't accurate ours weighed about 4400lbs loaded and that was max for the
axle.