Township ,then township section ; once identified can then be used to locate property owner on/ in a plat-book.
Some libraries have plat books and the township office will / should have such a book and it shows rough property boundaries.
They can be outdated. Updates are every few ,to several years.
The tax assessor knows who pays the taxes on each parcel though....
A gamble when approaching an owner. Do you tip your hand expecting the owner to know the history?
Stating an interest in history and the site being dated as old enough to produce a coin older than yourself might be enough. The owner might say they know the history.
Then there is the potential of having to negotiate how to share finds.
Being near a road is no deal breaker. The road may have existed back then too. Buggies ect. parked in the shade near road in summer may account for drops. More so when snow was on the ground and things fell. Folks waiting for a ride ,or waiting on riders....
If you have permission ,( or detecting is allowed) have at it during low traffic times.
