Accepts reservations for the following in more than 70 Washington state parks:   -  Camp sites - Yurts -  Cabins -  Other rustic shelters -  Vacation houses -  Group camp facilities -  Group day-use facilities    Reservations can be made year round as far as nine months in advance of arrival dates.  Please check Winter Schedule in the off-season for First come, first serve campsites. Same day reservations available. Online booking or phone reservations available.   Some parks are very popular, advanced reservations are recommended.