Just had a thought.
What about doing a group shave at the Tinnie and Tackle show. Huge audience, brilliant cause and fantastic opportunity to get last minute sponsors, corporate sponsors (as you could have promo gear on for them or signage) and bidding wars for the honour of shaving Steve, Lucky Phill and other team members heads. I am sure you can convince a hairdresser to volunteer their time. You could speak to Marine Qld about doing it in the seminar area where the competition weigh in is. They are working on timetables at the moment so it would be a good time to speak to them.
The shave doesn't have to be done on the actual specified weekend. You might also be able to convince some of the TV shows to do their reports from the Tinnie and Tackle show and they can plug the shave.
Cheers,
Janelle