Unlike many recent years the snow pack is actually good enough that some trails are open up north including the WMNF. The season opens on Dec 1st but for most years it is later in the season I don't think the clubs are ready for the season so there could be sleds operating in unusual locations until the signage is put back in place. If you do elect to follow a track if oyu hear one approaching its best to step aside into the soft snow and wave as they pass.