There is a reason why it is precious, so far I have done over 4,200k's searching for the stuff. I can tell you though I know the tracks, where there has been plenty of activity and some where none has been. The problem you have is time. Even searching for a few hours in an area is really only hit and miss. There is sooooo much land out there.
I am sure there is still plenty to be found, but when they say "No one gets all the gold" I can tell you that they certainly got a good share of it
However, in doing these trips. I have taken on learning more about geography. What type of rocks to look for and where to find them. I think I have been looking in the wrong spots perhaps ? Experience counts and these tour guides seem to know their stuff, one I saw was about $700 tag along which was good value to me. Money well spent to gain knowledge. One thing reading or watching a you tube video. Totally another with an experienced prospector showing you. This is what you look for. Well worth the $700 I reckon.
There are a few areas closish to Perth, within a 3-4 hour drive Paynes Find, some homesteads around and on the way. You could contact (In advance) as well if you wanted a little peace of mind, there is plenty of areas around there that could give some gold. I have headed right through the Nth West highway right up to Newman, covering, Cue, Meeka, Paynes, Sandstone etc... nudda
My next trip is east as that is where the volume is. It is called a Super Pit for a reason.