Hi Gavin,
thanks for the reply.
Here is a few of my views on getting started with detecting up the river.
1, Top of the list is make sure the river, stream etc that you are detecting has produced gold at some time.
2, That the detector you are using is capable of detecting small gold,about the size of a match head and smaller is ideal. Most of the gold that I recovere is from the crevices,cracks etc and nine times out of ten the gold will be wedged in and not presenting a large surface area for your detector to pick up on. Unless the over-burden is very shallow I don't detect it as it could be ten meters deep.
3,Get to know your detector, have a test bed outside and spend plenty of time using it, get to know its limitations.
4,Set realistic expectations for oneself, be very very patient, it took me over eighty hours detecting until I found my first piece (I still feel sorry for my partner!).
5, If you can find someone that has experience detecting tag along for the day.
6, Enjoy the day,and try not to get frustrated if things aren't going your way.
7, Be aware that there are many dangers that one can face while out there doing it,top two would be for me falling rocks and very slipery river stones, tell some one where you are going and what time you are due back.
I hope that gives you a few steps in the right direction.
I'm in Nelson and spend a fare bit of time up the Wakamarina mainly detecting although I have a claim and do a bit of dredging when I feel the need to.
My weapon of choice is a X-Terra 70 with 6" double D 18.5khz coil, a fantastic little machine for crevicing. It has paid for itself many times over.
Keep in touch and if you still have no joy let me know and if you like we can tee up a trip.
Cheers Steve