I don't have personal experience with drilling, but I used to work for a logging outfit and I know that when we were cutting a tract of timber the deer seemed to move away while we were working and were back when we quit for the day. They also would start traveling new roads we made almost as soon as we made them. Deer are curious and want to know what all the fuss is about. My cousin once killed a nice buck right in our wood yard one morning before we started working. We had seen tracks on the road and seen him in the yard when we showed up for work one morning. He fashioned a blind behind some fallen trees and arrowed him the first time he sat in it! I think you will see the same kind of thing with your situation.