I've had skunks, possums, racoons, mice, squirrels, marmots,coyotes,kit fox, ringtails, ravens,canada jays, seagulls, porcupines, and last , but not least bear, visit my campsites and have never had a real problem, as food was always hung, in a bear can or a metal can.
It'll give you peace of mind when things go scrath, scratch in the middle of the night. The Ursack that Pika mentioned is worth looking into.