Jim- Unfortunately bears are no longer "wild" in many well used backpack areas. I have had a bear bite into my toothpaste, a marmot chew trekking pole handles. A friend had his shoulder straps chewed through by marmots. A friend's teenage son left crackers in his car and when we got back the window was busted and crackers removed. Bear prints covered the car.

As for the tent, a shift in wind during a rainstorm can drive rain into a tent. Some places, rain is almost horizontal. A tie can break and the fly start flapping. Lots can happen when you are away.