I have a '14 3150RL. Had a hitch shop fab up a 2" receiver for me. Hitch is "bolted" on with 8-1/2" bolts. NOT welded on. My fresh water tank is in the rear and if service is needed I can un-bolt the hitch. plus, bolts are stronger than welding.
I have double towed for years with it and not a single issue, the heaviest trailer was about 3500 lbs with 350 lbs on the pin.
2 of 8 bolts holding hitch to frame. I have seen the cheep bolt on ones available (so called universal) hitches fail).
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2012 Ram Laramie 3500 DRW 4x4 3.73 Tow Max Pkg B&W Companion 60 gal RDS aux fuel tank. 2014 Montana 3150RL, 2 A/C's, Leather, 6 Point Jacks, Splendede WD2100XC, Mor/ryde X-Factor, Duravis 250 tires with TST 507RV monitors. 2 x Honda EU2000's