The first thing you should do is to fill your fuel tank, load up whatever you would be carrying in your truck when you are towing - grille, dogs, and the whole family and head to the nearest truck stop and get weighed - total and each axle. Add 175 lbs for the 5th wheel hitch and see what your weight is. Subtract this from your GVWR on the tag on the B post of your truck and you will know what the maximum pin weight you can have. Figure your pin weight will be around 20% of the GVWR of the trailer. The dealer will say the pin weight is as specified on the factory weight, but when you are loaded, the factory pin weight is just a myth.
Elliott, Vicky, and Sadie, our GSD
2014 Redwood36RE Titan Disc brakes, 17.5 " Sailun Tires
2013 RAM dually, CTD, Aisin Tranny, CC, LB 4x4