RE: how to kill a bear quickly?
Don't let this scare you off the property! You will probably never have a problem again, but yes, that .30-06 will do the job. If a bear is running straight at you aim center mass. Or if you can make the shot right into the head. I doubt you'll have a problem but it pays to be ready in case. Practice shooting when you are at the property and just keep your eyes open. Everything should be fine! enjoy the property!
-Jake