Good tip right here. Call you local game warden and mine him for some data. He will know some local public hunting areas that could be good "semi-secret" spots to hunt.
EDIT: In Ohio each county also has its own ODNR game warden. They generally are a great resource and wealth of knowledge, you can find contact info for the one for your county, or the county you will be going to at the ODNR website. While they generally are busy, most are also very friendly, and would rather answer questions beforehand, than issue citations in the field for honest mistakes. So give them a call.