One thing to remember is that bears don't like all acorns. Live oaks and white oaks are their favorites and if you have many of those you're usually going to have a lot of bear. They will eat tan oak acorns but not as well as white or live oak. Black oak acorns can be covering the ground and unless they're starving or there is absolutely nothing else to eat they won't touch them. Pin oaks and mush oaks they treat about like black oaks.