I'd recommend checking the gravel banks of the Little Miami. Though I haven't lived in Cincy in 20 years I did research back then to find where indian settlements were documented and such. I recall that the river near Turpin was supposedly had such a settlement on its banks. Check the bank area near Lake Isabella. Back in the mid 80's some kids found a complete mammoth mandible in the creek that runs parallel to Reading Rd (south of Glendale-Milford Rd). They were searching for golf balls next to driving range when they came across the find. My thought is that if there is items of that age in that creek then other items (clovis points maybe?) might be there as well. There were several books written between 1880 and 1900 that note local finds though I can't recall the titles (the main library downtown Cinti had them). As a matter of fact there is a street downtown called Mound St due to an indian mound that once stood there. Oh, and don't forget checking the banks of the Ohio. Folks are always find stuff there. I found arrowheads on the banks of the Whitewater River while canoeing down from Brookville (IN). Sorry I can't give you something more concrete but, as I said, I haven't lived there in 20 years.