I found this on the Department of Wildlife and Parks website: “Currently, all restroom facilities are open and water is available at all rest areas except Carlyle. We will begin to winterize and close our facilities on October 31, 2013. Richmond will be the first facility shut down for winterizing and maintenance. The rest room will be closed on Oct 31, and the water to the outside fountain will be shut off on November 4. We will then shut water off at all other facilities and begin closing other restrooms for the winter through the first two weeks of November. We will close Princeton and Carlyle last, as they are the busiest restrooms. Restrooms in the Depot in Garnett and at the Depot Museum in Ottawa will remain open through the winter.”
Hope it helps. Have a good trip on the Trail.