Without sounding like I'm piling on, the fact is a 2WD, duallie is toxic on ice and snow. Even with a limited slip rr end, it's hopeless. The problem is lack of ground pressure. If, you will NEVER see anything slippery (snow, ice, mud, grass, wet parking lots) and use it in the summer Only, then 2WD will do, especially with a heavy camper over the drive wheels. Having owned and used to the extreme 14, 4WD's, I can say that a car with front wheel drive and a limited slip has a much better chance than a 2WD duallie. Case in point: our 1999 Chrysler 300M. It's sleek, low to the ground, 4" of clearance, but has most of the weight and engine right over the limited slip drive wheels. It always surprises me how well it does in 4-6 inches of snow. At 6" it's dragging the under carriage, but keeps moving. You can "feel" the L.Slip hunting back and forth on the wheels, grabbing traction where it can. Ground pressure. It's a good thing. A 2WD duallie doesn't have it.
regards, as always, jefe