Stop walking. All the birds are probably seeing you, but you aren't seeing them because you are walking.
Here is what I would do if I didn't know where any birds are roosting at: Find a field edge that has a good view of as much wood frontage as possible but offers nearby cover for you to sit in. Be there before sun-up (0500) and put your decoys out about 20 or so yards from you and where they can be seen well. Light tree calling at day break. Stay put and wait. If you see a better spot, don't move there until the next day.
Also, when the hens are sitting on their eggs, that is probably your best chance at calling in a tom. Less hens and he is lonely so he will constantly be on the move. You can also find dusting areas and pay attention to what they are eating. These will be good afternoon ambush areas. If you can find a roosting area, that would be great for morning or late evening as they are going back to the roost. Remember, Ohio turkey hunting from here on out to the end of the season is sun up to sundown so you can hunt evenings now too.
I have been seeing turkey populations here in south west Ohio increase tenfold the last couple of years in my area. You may want to find a decent piece of private land that has fewer hunters on it. Less competition and much safer too.
Good Luck.