We went to Greenbrier for the weekend and had a great time. We stayed in the Cedar Loop (the one with power) and had a nice, level site with a picnic table and fire ring. The sites are wide and deep, with a gravel surface, and nicely terraced into a hill. The bath houses are newish but only OK as far as cleanliness goes, at least with the free showers; the toilets were fine. The spring-fed lake was clean and pretty, with fill sand making a beach that extends into the water. Nearby was restrooms and a snack bar as well as many picnic tables (which were all filled). The only drawback at the lake were the 150 dB announcements broadcast around the lake on gigantic air-raid style speakers on poles. Each evening there was something happening for the family at the amphitheater in B-Loop. Friday night, they showed The Lion King and had popcorn and drinks. Saturday night, there was an ice-cream social followed by presentation by the Park's senior ranger about the trip she took to Africa in 2009, where she climbed Kilimanjaro and went on a safari.