The course was still open about 2 weeks ago when it should have already been closed, perhaps they forgot to close it. However it is used by snowmobilers so I assume they will get to it soon!
Open field with mowed fairways and tee markers. $2/9 holes, $4/18, or $40/year. Paying is on the honor system. All of these funds do get used for upgrades and course maintenance, so if more people paid, maybe they would eventually get concrete pads and change some holes slightly. I learned this directly from the course designer, so please pay your fees!