Right now, with very low water levels , is a perfect time to be searching along the river..Receded waterlines are going to give you a look at otherwise invisible locations which very probably, hold some finds....I'd also search along the sides of islands.The moment is right!
As for fields. Toward the end of the winter, melting snows have cleaned off stones to the point where the artifacts are easy to pick out..Don't always expect to find a point lying flat down on top of the ground..Look for an edge, or just a "rock" that is an off-color, something out of place..Remember, the arrowhead material did not originate there. It was brought there, so it most certainly should stand out against the local stones.
As for fields. Toward the end of the winter, melting snows have cleaned off stones to the point where the artifacts are easy to pick out..Don't always expect to find a point lying flat down on top of the ground..Look for an edge, or just a "rock" that is an off-color, something out of place..Remember, the arrowhead material did not originate there. It was brought there, so it most certainly should stand out against the local stones.