Watchman Campground in Zion National Park (IMAGE) The University of Montana Caption The researchers studied the busy Watchman Campground in Utah's Zion National Park. They used big data from national park reservations to understand how visitors pick campsites. Credit U.S. National Park Service Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.