This area is definitely open. I am here now. The south entrance remains closed due to vandalism. But whole area is open and accessible from the North entrance.

This is off the website for that area. I was curious as well, and I haven't seen anything 'officially' saying its closed.anywhere online: Access area open: Year-round. Closed to vehicles October 1 - February 28. https://wdfw.wa.gov/places-to-go/water-access-sites/30178