We just got back from staying at the Nest at Treebones. If you enjoy nature, this is a must! The campsite included a giant nest with a beautiful view of the ocean, and a space at the bottom of the hill where we pitched a tent. There is a fence around the nest to discourage other curious guests from climbing into it. It was an incredibly unique experience. The mattress included in the nest was more comfortable than I had expected and we did not add any padding other than a sleeping bag and sheets. I had been concerned about bugs but did not find this to be a problem in the nest either. The bathrooms are about a 3 minute walk away.
We did not eat at the lodge other then the included breakfast. In many ways, we felt underdressed since we were doing more of a camping experience. We took a stove and cooked at our site. If you wish to go hiking or to the beach, you will need to drive offsite. Sand dollar beach is close by, and if you go at the right time, you do indeed find plenty of sand dollars. However, there is not a lot of hiking at this beach.