B y the numbers That is the number of campsites at Ohanapecosh Campground at Mount Rainier National Park. The campground, in the southeast corner of the park, is expected to open for the season May 24. Campsites are $12-$15 a night. Although campsites are available on a first-come, first-served basis, you can reserve sites at recreation.gov. Cougar Rock Campground is not expected to open until June 27 because of sequestration and construction. Learn more at nps.gov/mora/planyourvisit/camping.htm.