Dont know about the Cobden Aviation people BUT Stawell Aviation Services is run by a bloke called Graham Boatman.
What Graham doesn't know about single engine Cessnas probably isn't worth knowing.
Does plenty of charters and fire spotting ( although you will want plenty of hours before he will let anyone do fire spotting - think 1000+). Does do training (including an excellant advanced handling course on bush operations) but can be a real pain to get bookings.
Think he has 2x172 2x206 1x172RG and has a tecnam(is the vic/tas agent, so very biased).
Great pilot, loads of fun, knows his stuff.
Has had some issues with CASA (suspended AOC for a while, lots of time in courts, lots of money paid to lawyers, Graham back in the air).
Just for the record Graham is a competitor of mine so I am certainly not trying to talk him up for my own benefit.