Pretty well every creek within the WA gold fields will give up small sub gram nuggets, no matter how flogged the creek is. Even the best detectorist out there using the best machines cannot pick up many of the smaller nuggets which work their way to the bottom of the bedrock cracks. Many of the cracks are around 10cm or more deep and any flat sub grammers remain undetectable at this depth, especially if standing on end.
Some of these cracks contain numerous small flakes as well, and at times it's not unusual to pick up a gram from within just a single crack. Because these flakes are not joined together, and often several cm deep, they are virtually undetectable with even a 5000 and Sadie Coil, (don't care how good you are).
Nearly every time you find a nugget in a creek bed, if you have a blow tube in your pocket you'll inevitably find several small pieces close by in the cracks. Where the bigger nugget gets trapped so does all the smaller pieces and most people walk away from several easy grams during a mornings detecting.
Give it a go sometime flashhunter and you may be pleasantly surprised. Best of luck with it mate.
Cheers Wal.