Car-pooling is common on these outings. On the Noojee trip back in March, two Geelong photographers (myself and another) drove to Melbourne and rode with SMBooth and another person to Noojee. I'm sure something could be arranged to accommodate you in the absence of a car.
It does look like we are firming on the Pinnacles, but we'll hold out for any other suggestions to consider. It would be very interesting to get back there after an 11 year absence.