I have a 2011, 1500 with the 5.7 Hemi with 3.92 rear. I tow my custom-built toy hauler with my 16 ft boat inside. My gross combination weight (with full camping load) at the CAT scale is around 14,440 (with full fuel and crew) ± a few pounds depending on odds and ends carried. Using a WDH (no anti-sway) the CAT paper shows Steer Axle 3120 [spec is 3,700]; Drive Axle 4160 [3,900]; Trailer Axle(s) 7160 [10,050] for a total of 14,440 [15,500]. I can shift more weight from the drive axle to the steer axle by tightening up on the WDH chains.
I have pulled on I-95 I-81, and the mountains of I-26 & I-40. I have found that locking in 4th gear even on the flat ( and running about 2,700 to 3,000 RPM) I get better fuel mileage because it does not shift from 5th to 4th trying to ‘catch up’ so often.