The nitro is Dodge's version of the Jeep liberty. The same requirements that apply to the Jeep will also apply to the nitro. It will either need to be 4 wheel drive or you will have to use a driveshaft disconnect. Other than that 4 down for 4x4 will require tow bar, base plates, tail light wiring and a supplemental brake system. A 4x2 will require a driveshaft disconnect for 4 down or can be dolly towed. Even with a dolly you will need a disconnect for the 4x2 but a dolly will have electric brakes or surge brakes already on the dolly as well as lights.
2007 Newmar Kountry Star 3914, ISL400
2001 Jeep Cherokee toad, M&G brake/2011 Jeep Grand Cherokee Overland