I have been in there several times and been stopped by opp. They usually go in and do a blitz every so often. They told me they judge speed by thier eyes so obviously they weren’t in there to hand out speeding tickets, but to check paper work and insurance and ensure you had paid for day.
Lots of people just ride in and don’t pay and use trails for a few hours and leave. So they do blitz’s every so often to catch these people. Strictly paid by forest as it is private. If you had a can and racing around in there, I am sure they would come up with some sort of extra fine.