Great advice from everyone here. I mostly searched tidal rivers, so my 2 cents may not be as applicable. BUT, points can gather in the pools below (downstream from) a big rock, where pools gather things up and get stuck in the eddy (low pressure?). It's easier to search when the water's lower than usual, later in the summer- and when there isn't so much current and more exposed creek-bed. But more than anything, it's about being persistent. Just keep going out and looking. See if you can find a place along your creek where hunting might be best (or fishing)-- and would have been best for a very, very long time. Places like that don't really change much over the years (and centuries) depending on land development in you area. Make time to check your creek after a heavy rain or storm, as that will change the topography of the creek-bed, and as it is w/ tidal rivers, artifacts can be just a thin layer of sand or silt away and you won't see them, so check regularly. Good luck!!