>>1944097try this book out mate, its info works anywhere The Guide to Gold Panning in British Columbia: Gold Regions, Methods of Mining and Other Data Bill Barlee
Yes people have said both to me that the back and front of boulders carry good gold, but i think it depends on the specific current your dealing with at each spot. Also yes thats a Rocker Box, I build dozens of them and stash them for later on different spots, the old tech works great if you know how to use it right.