Welcome Tubeman. You've done well getting yourself a 120 acre wood! I'd spend some time (a few visits ideally) just walking round (at different times of the day if at all possible) to get a feel and see what is about. The owner, however, might expect differently and see you out and about with your gun.
Try at least to spend some time just looking and learning the lie of the land and which creatures favour which bits. This all takes quite a time really and years hence you will find yourself surprised at times. I am a long way still from getting a handle on my shoots.
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery. Winston Churchill