Here's what I tow and haul with, 5500 Dodge. It's the 6.7 diesel with the six speed stick. A little over rated for you, but it doesn't ride bad at all and gets @ 15 mpg with the 4.44 gears. You could put a camper on the back and pull all your toys.
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I want that same setup, but in a crew or mega cab. Gotta have 4 doors if the tow rig will ever see time as a daily driver!