The west side of the park Standard (dry camping) sites 192-233, are currently open for first come, first serve self-registration camping using cash or check for payment. Use the west side entrance off Highway 105 south. A self-registration station is located at the bulletin board at the first restroom. Registration fees and information, rules, and emergency information is located on the bulletin board. The water is on as well as flush toilets and hot showers. Shower tokens are required and available from a dispenser at the second restroom. Cash only-small bills are suggested as the machine doesn't give change.
The east side gate at the main entrance is closed. The Welcome Center is closed September 15-May 14th. Utility sites and the trailer dump are not available at this time. There is standing water covering the east side of the park.
The cabins and yurts are still reservable. Reserve cabin and yurts online at www.washington.goingtocamp.com or by calling the reservation center at 888CAMPOUT. Please be sure to read you reservation confirmation paperwork for arrival instruction.
The day use area is open all year.
UPDATE:
The seasonal closure will extend until at least 6/1/2022 due to the cold, wet spring weather. The park has not dried out as usual by this time of year. Existing reservations for sites 1-85, 233-282 will be cancelled and refunded in full.
Original source can be found here.