Any body else experience these symptoms?

I have been scouting some public land and found some birds. Now as opening day approaches, everything seems like another hunter found the same birds. Every crow and owl sounds like another hunter. I went scouting last weekend and heard a crow go off 20 minutes before day light, I would have sworn it was a hunter. No new ribbon or tape in the area, but am always concerned about old tape. I never like to use it to mark my spots, I always felt like I was just giving someone else my locations.
So now I am flip flopping back between a couple of spots, where to park, Do I go to my blind or sit on the trail in case I have to shine other hunters off. I hate when the bird keeps gobbling and assume someone else is going to hear him to.

Anybody else? Do you guys like to use ribbon or tape to let others know you might be there? 1 of my pet peaves is when someone writes there name and what hunt they have, like they are calling that spot. I HATE that. Usually find there tape for a mile square with several hunts in the area.