HypnoToad, I'll bet you been riding the "outdoor hockey rinks" with street and trail signs that have spouted up around the MN/Twin Cities around Xmas after that freezing rain. Even today I'm still seeing some street intersections on my breakfast ride route with polished ice ruts. I don't know what single track trails look like currently, but there could be sections there too I'd suppose.

I have a new fat bike and even with lower pressures, the polished ice ruts and slick sheet ice are a challenge. I have a set of Nates on back-order coming in that I know will handle the snow well, but I too am thinking about the ice after the past few days. My current thought is to stud the Nates with grip studs. Not only are the Dillinger's pricey, but I'm not sure they have the snow/loose stuff traction the Nate's have. If you, or someone else here has gone the Dillinger route, I'd be interested in hearing about how they handle snow.