wind vane self steering

[Pa La O La]

In my reading I have been seeing the topic of wind vane self steering. Power consumption is a real consideration and that element was part of the reasoning of the last article I read. I have auto helm but it is hydraulic motor driven and a 12 volt drain. I am interested in other skippers experience with wind steering and specifically as it might apply to cats. I know zip so anything will be food for thought. I have a 1993 Prout Snow Goose. I can access the rudder post on the port side through a port for an emergency manual rudder. It seems a good point for attachment and wouldn’t preclude but rather enhance the ability to have an emergency tiller. Thoughts ? Experiences?

Gary