Morro Bay State Park is on of the coolest coastal parks I have visited. We did a kayaking tour and got an up close view of the active oyster farming which was fascinating.
This is an easy place to kayak as calm waters of the bay provide the perfect setting for even beginners. There are plenty of other things to do such as hiking trails, bird watching, and fishing. The park is also home to the 500+ foot tall Morro Rock. Really cool place.