I received a response from the F. Gilbert Hills DCR Land Manager/ Supervisor. Basically as Bill Belichick would say – It is what it is. The information can be found in the website Stu provided. Why now you ask? Well, the DCR Rangers are probably issuing the written warnings as a polite education tool. Also, understand if someone did get injured at night requiring medical attention, First Responders are more at risk if a victim needs to be extricated or rescued. There have been no issues about night time use other than its off hour usage.
I have been riding Foxy 18+ years and this is new to me also so please don’t shoot the messager, but use best judgment when parking/riding in F. Gilbert Hills State Forest after hours.