Hi Pablo,
I'm not sure there has been much organised yet for post-eclipse general observing in the Cairns area but you may want to keep an eye on this thread:
http://www.iceinspace.com.au/forum/s...ad.php?t=97922 which is specifically for people/groups who are having observing meetups after the eclipse. I'm sure you'd be welcome at any gathering.
Hope you and your group enjoy the trip.