Group camping under the redwoods in Portola Redwoods State Park. Ravine Group Campground is a tent only campground that can accommodate groups up to 25 people, including children. The campground is a short walk from the parking area, so be ready to pack in all the supplies. Six vehicles are included in the group campground price, so any additional vehicles will be charged extra. There is a shared restroom and drinking water faucet nearby, and hot showers are located in the main campground. Ravine Group Campground is adjacent to Hillside Group Campground, which can accommodate 50 people.