I wheeled at Rausch. 2" spacer and 1" shackle. It can be done stock height, its all about picking your lines. This time of year you would probably want more agressive tires, at least A/ts. I was there when it was dry and the stock tires worked just fine but with snow/ ice/ water i would definetly get something more agressive.
2011 Frontier SV 4x4 Long Bed
Adjustable shackle at 1"