We have not seen a foot of snow and the river frozen over at mid-December for many years. What used to happen next was frequent small snowfalls and no significant thaws until March 30. I live in hope.
We knew that the single-track snowmobiles that we purchased would not pack snow as easily as the old double-track machines, so opening trails is going slowly. As of today, Dec 17, there are good tracks on D, R, X and M and a reasonable skating surface on M. H and S are packed and rolled. C and B have not been groomed at all yet because they are the roughest.
The plan is to try to set a track on C and pack B, followed by rolling B and then setting a track on H, S and B. Hopefully, this can be completed before Christmas.
The ground is still very close to your skis, so scratches in your ski bases are a definite hazard. Also, there are wet spots on S and presumably also on R.
Happy skiing and Merry Christmas.