x2. In Ohio, the most important thing is being where the birds are. I know that is important wherever you hunt, but more so here because there are just not that many around. If you have not done your homework, don't bother going. Like he mentioned, the Buckeye State seems to have more hunters than available land and game - especially around Columbus - you are going to have a difficult time finding a spot that has not been found by someone else. That does not mean it won't happen. The difference is how willing you are to make it happen. It will take a couple years of living in the area before you get a feel for how the birds around here behave. Keep your eyes open and don't dismiss any possibility till you have thoroughly explored it. Being successful in Ohio requires recognizing opportunities that others may overlook. Find the birds, find where they go, learn their patterns. I have found that most public areas are not worth the time. The big lake near me here in the SW part of the state (won't take you long to figure out what lake I am talking about) is absolutely abused by hunters all year. The birds get hammered and the few that actually stick around are more educated than I am.
You mentioned you are set up for divers? If you have experience hunting on big water, you may want to look into Lake Erie. A bit of a drive from Columbus, I have never hunted it but the guys I know who do can clean up when conditions are right. You may want to look into that.
A year from now, you'll wish you had started today.