If you don't fall into any of those categories, you may wish to reserve the campground and observatory for a night of your own personal use. That's exactly what the observatory was built for. Call the observatory at 707 833-6979 and leave a message on the recorder. We'll call you back and take care of the arrangements over the phone. You need to allow at least a week to get a volunteer docent arranged for a group observing session.
More time is better.
The optical design is Newtonian. Light goes first to the back of the telescope to the large 40-inch mirror, is reflected by the curved mirror to the secondary mirror near the top of the tube, which reflects the light into the focus off to the side where you can place an eyepiece to look at it. The mechanical design is a Dobson altazimuth mount. It is meant to be easy to transport, move and use. This kind of telescope requires a computer to drive two motors simultaneously to make the mounting track a star's motion as the earth revolves on its axis.