Operating Schedule Welcome to New Hampshire State Parks! Typically, campgrounds open for the camping season on Memorial Day weekend through Columbus Day weekend. Some parks offer first-come/first-serve sites pre and post the regular camping season. Reservations for camping can be made 11 months in advance online or by calling 1-877-647-2757 (1-877-nhparks). Below is the 2010 Operating Schedules for the NH Division of Parks and Recreation: 2010 NH State Park Campground Operating Schedule 2010 NH State Park Day-Use Operating Schedule 2010 NH State Historic Sites Operating Schedule 2010 Unstaffed NH State Parks State Park lands are always open for recreation. Please be reminded that comfort stations may not always be available and all items (including trash) must be carried out with you when you leave. Should an emergency arise during your visit and a park is unstaffed please call 911 for assistance.