I hear ya Tim ...
Like the critters we hunt, you have to have the critters #1
1 old farm house I spent many years in in my youth was imho a native village /hunting camp area . Some plowed areas held large areas of flint chips. This is maybe 25-30 miles as a crow flies from flint ridge. Some of the flint is of that dominant flint ridge color as my broken point tip above....some black , some everything between. All precious to me.
So yea, one has to find a good "area" to be most preductive....and then hunt past hunting areas.
My great uncle had a collection museum worthy. When a pup , I spent weeks on his farm . most evenings he would dump show boxes full of his lesser finds for me to look over and stir the soul of a future hunter
Sad , non know what happened to those finds when he passed ......He was of a generation breaking ground for the first time in areas with the plow....be that good or bad. So they had pretty easy pickings for such discoveries.
Best of luck to you my friend .....