Drove my MH lots of miles on snow and ice when we had it. It actually drove very nice in the snow. Long wheelbase so if it slips, it does it very slowly, and easy to recover. My water tank was in the rear, so I made sure it was full to add lots of weight on the rear duals, giving much more traction. I would do it again no problem.
However,I haven't pulled my fifth-wheel in the ice or snow, and don't plan on it. My truck handles like a pig in the snow unless the 4 wheel drive is engaged, and I don't like to do that for long distances. We are considering changing back to a motor home this year. Love the fifth-wheels huge space, but not conducive to bringing family along as well as the dogs, plus we would like to use it more in the winter.