Your comment on the difficulty for many of us, of balancing sledding time versus family time, particularly at this time of year, leads indirectly back to the topic of this thread. Permits. In the south, the permit(s) purchase is complicated by the lack of a local snowmobile season. In the past four years, I have snowmobiled locally (no out of town lodging) five days in D4, 5 and/or 9. For me that doesn't effect my decision to always purchase my pass early. I will go wherever the snow is, but that is not an option to hundreds of (former) southern sledders whose families aren't totally into sledding, and their departures to the north sledding would upset the family balance.
For many friends, the new winter norm has them in various stages of snowmobile withdrawal. Some have cashed out completely; some who bought passes in the fall of 16 and 17, only to never use them, have kept a sled or two, just 'in case'. A few continue to buy passes in perpetual hope. Some have bought two day passes on occasion in the past couple of years. I can't blame them for that, when family commitments are such that, even when we get a week of open trails, they may be off with family to a hockey tournament or a family reunion. I can only assume that full season pass sales in District 4, 5 and 9 have been steadily falling. Amongst friends, the negative trend is somewhat offset by a couple of gentlemen of age being somewhat freed from the daily work/life grind, such that they can contemplate re-entering the sport as touring sledders. This however, is a tough decision when they know the cost is going to be higher than their previous sledding was, while their income has declined.
I know there are smarter, more connected people than me studying the trends, and hopefully there will remain a viable market for our trail system. But I don't see how this can happen without more trail pass enforcement, and possible more pass options (I know that has been beat almost to death....)