The Oregon Parks and Recreation Department reports wildfires have so far burned about 900 acres of state park land, most of it undeveloped forest.  Some parks remain closed due to windstorm damage, or their proximity to active fires.  Twenty-four parks have been closed since September 7, when rare, severe wind events caused wildfires to quickly sweep the landscape.  OPRD Director Lisa Sumpton says given the scope and severity of the fires, the 900-acre toll was a testament to both luck and extraordinary first responders.  The heavily forested Collier Memorial State Park took the biggest hit, losing some 400 acres of Ponderosa Pines.  OPRD Forester Craig Leech said that although 400 acres is a lot by any estimation, careful fuel reduction and stand improvement slowed the fire spread enough to be contained before major damage occurred.