Hanging your food at night would be prudent. There are a few black bears, but there are lots of small mammals.
Since Big Sur is next to the ocean, the overnight temperatures stay more moderate than inland. Still, you need to prepare for freezing or a couple of degrees colder than that. But you won't see +20 F.
One springtime, I was sleeping along the Tassajara Road, and I woke up with frost covering my sleeping bag.
–B.G.–

