After green in the Spring I'm gonna put an old 2 bottom disc plow to work on my food plots in Hardin County. Over the years one plot has produced a few points after being disced and then getting a good rain. I believe there was a village at that location back in the day. Probably gonna turn it about a foot deep. I get excited just thinking of the possibilities of what might turn up in that plot. In my ignorance I have picked up and tossed several hammer stone type of round/oblong creek rocks from that field over the years.
I hope you find a bunch of killers.
It would be nice to get some rain directly after you plow and before you disk.
I always tried to plow right before rain was forecast and before the soil would dry out too much, and a lot of times it would melt like butter if it was a heavy rain, and that flint shines like a silver dollar about one to three hours after the rain and the dirt begins to slowly dry out. We know our chances of damage increase after we disk so I kept plowing several times before I ever disked. In addition, I was trying to kill out some thorned honey locus. I would let as much rain as possible on the plowed area before I disked, but I understand you are trying to plant as well. I eventually planted some Ladino clover, but it was fun until then.
At the risk of sounding like Im patronizing, try and remember that it is super easy to walk right past them and there could be the tiniest of edge exposed and that walking it systematically in every direction and looking from every angle can help. My best vision is on cloudy days because it doesn't cast a shadow from the larger clods of dirt, sometimes making it more difficult imo.
Good luck and happy Trails