We wanted to stay in Pinnacles National Park, but the campground was full. We ended up staying there the next day, but ironically, I liked Sweetwater much more. It's a somewhat long drive, but you're rewarded with decent solitude. There are only a few sites, so we got lucky. I was surprised how nice the campground was, especially since it was free. Be aware there is no water available. It's definitely not as convenient as staying in Pinnacles, but I would choose Sweetwater over camping in the park.