Very impressive change to the property. Here in East Texas, a State Biologist told me that if you where here 500 years ago, the natural landscape would be open with nothing growing between the bigger trees. It would be easy to walk through, and there would be grass growing on the ground.
Then people came and cut down the trees and stopped forest fires. When they abandoned the fields that they cleared, mother nature took over, and everything grew at once, which choked out the grass, and made it impossible to walk through the woods. This is the main cause for turkeys not being here anymore.
It would take a hundred years to return to normal, but only if forest fires are allowed to happen again. Since that isn't likely, mowing between the bigger trees, like what you are doing, is the best way to return the forest to what it was before humans showed up.