Doesn't much matter where on the Turon you are these days, the edges have all had a good work over out there. We have had two separate floods recently that would contend for one in one hundred year flood status. They have redeposited reasonable amounts of flood gold into the usual stream edge bedrock bars.
These floods however weren't severe enough to strip overburden from the more central section of the rivers gold line, and as such the mid stream sections still hold by far the best gold, including some quite reasonable nuggets. You need to be able to access these mid stream sections and this is best done once the water levels are low and warm enough during the summer months.
You do not need to find bedrock bars in these sections as the gold falls out with the larger boulders within "current lines", and hangs with these boulders, so current lines are what to look for, and not necessarily structure. Remember the current lines during a big flood are nothing like you will see with the low water current and can take a vastly different line. It's the edge of these strongest current lines that you need to firstly find and focus on, then work for the heaviest and richest gold which will be within this line.
I generally find these by a system I call "in stream loaming", and though some will tell me it's not actually loaming, i pay no attention.
. Start from where the strongest current can be seen, and pan a sample, then sample 1/2 metre intervals toward the inside bend of the river in a strait line. Do this at five metre intervals down current for about thirty metres.
Take note at which point the most flakes were found in the pan and join these best test samples in a line. You can do this in a strait section of the river as well as in the bends. You do not need to dig more than thirty centimetres deep for your test pans. This will get you pretty close to the rivers' gold line and that's the point of the exercise.
Note that your samples do not need to show a great amount of flakes, as being surface wash will only contain the finer flood gold. The heavier gold will be in same line only sitting closer and on the bedrock. Can't put an X on the ground for you, as this can take a little bit of time and practice to master, but if you follow these principals you will generally reap better rewards. Hope this helps.
Cheers Wal.