After seeing the pics of the creek you are hunting I can just about guarantee you there are artifact to be found amongst the gravel and rock in that streambed.
My first suggestion is to hunt as much of that streambed as possible, not just 75 to a 100 yards of it as you stated in your first post. It's a beautiful stream!
yea thats an ideal looking stream,if you are finding artifacts in the field near there you will start finding some good stuff,just keep at it.thx for sharing the pics.