The group's Facebook page features old maps, newspaper articles, aerial photos, and photos of places such as the R.A.N.depot at Somerton, the water tower at the Greenvale Sanitorium etc.
Link- https://www.facebook.com/Craigieburn-Historical-Interest-Group-279956502017555/

If your family is known to have been involved in the area along Sydney and Mickleham Rds between Somerton Rd and Wallan, it's a fair bet that you'll find something about them in the body's publications on the internet. Say, for example, you've seen mention of your family member being at Kinlochewe, the only detail of this place in BROADMEADOWS: A FORGOTTEN HISTORY being that there was a toll gate there. In the group's articles you'll find that the origin of the name was that Mt. Ridley, a landmark for those travelling west across the Merri Creek, was originally called Kinloch Hill. You'll read of the tragedy of Captain Pearson's first marriage, his second marriage to a Godfrey girl (Frederick Race Godfrey's cousin) and his renaming of Kinloch Hill as Mount Ridley because of a topographical feature near the Godfrey estate in the old country.

Here are the families mentioned on the Facebook page.
1900'S: BOYD, CASSON, WARBURTON, SORRAGHAM, EDWARDS, MAHONEY,KERNAN, SIMMIE, WILLIAMS,HARVEY, COLLINS, FERGUSON,
HOWAT, McCALLUM, ANDERSON, POOLE, WALLBRIDGE, WILSON,BROOKER, GRAY, REVELL,

1800'S: PEARSON, GODFREY, McKENZIE, CROWE, JOHNSTON, CRINNION, BRODIE, DYSON-HOLLAND,KELLY (Ned), PARNELL,

The many articles are extensively researched, contain fantastic genealogical information and photos and are very easy to read. The list of articles can be found with a http://www.chig.asn.au/Photogallery.htm search.

Some of the pioneers are not the subject of an article but can be found by searching for a surname/ place,and the name of the group: e.g.1. SINCLAIR, CRAIGIEBURN HISTORICAL INTEREST GROUP.
RESULT: Mother Teresa School - Mt Ridley - Olrig Homestead
www.motherteresa.catholic.edu.au/our-school/409/p/olrig-homestead
Olrig is of local historical significance for its association with James Malcolm, ... Malcolm was an associate of John Sinclair, of the Port Phillip Association ... the Craigieburn Historical Interest Group's website http://www.chig.asn.au/Olrig.htm ...

e.g.2. donnybrook, craigieburn historical interest group
RESULT: Fellows of Oakland Mickleham - WikiNorthia
www.wikinorthia.net.au/fellows-of-oakland-mickleham/
Jul 27, 2014 - The Fellows' family grave is at the Donnybrook Cemetery. ... [1] Craigieburn Historical Interest Group, 'A list of Mickleham land owners in 1863”, ...

Sometimes the group's articles are published under its abbreviation: CHIG,such as the following one. I'd never seen any mention of the train being delayed by crashing through the gates at Craigieburn. If it hadn't the Kelly gang would not have been defeated. http://www.chig.asn.au/ned_kelly's_page.htm