Sometimes when a chain saw starts up that will bring deer running as they know that logging is about to commence, along with fresh tree tops to munch on. Sort of like a new restaurant opening up with free steaks. Personally I have seen loggers within sight, and also at the same time have seen deer moving without acting the least bit spooked. In the PA mountains that I hunt logging activity brings deer around for miles. All depends on your area I guess, and what happens when machinery starts up. Will it provide fresh food for the deer?
If so don't be so quick to leave.