I am sure if you find where the creek and the river meet (I won't post the names of course), 3000 years ago, you would find a tremendous amount of points there. Surely that was an established camp area for 1000s of years. This point was found about .5 miles north and .9 miles west of your duck spot.
Speaking of duck spot, I put a flyer in the bbq joint down the road, looking for a second lease. You got any leads? We also need to make it a point to meet up this year for some of that bad arse bbq samich. On that same hill I found the point, a guy missed a big big deer Sunday evening.