From my point of view, Seabreeze.com.au is the go-to spot for landsailing info and comrades. At the moment I see no reason to join the federation, landsailing is just for fun for me and I get info here for free.

There have been a couple of NSW members here. Hopefully they might let you know where they are at some point. I run a group of Facebook called 'Network of Australian Isolated Land Sailors' and try to post up bits and pieces re. east coast events and general landsailing fun.
What part of NSW are you hailing from? Hopefully you have a suitable beach near you, best I have are sheep paddocks