Contacting a Higherside Meetup organiser (The Great New Zealand Meet-Up)

Hiya.  Is it possible to contact the organiser of a meet-up?  I was hoping that I could add a message to the RSVP but alas, no.

@thecarlwood - Greg, I'd be happy to provide you with my email address to forward on to the organiser if that is an option.

Thanks in advance.