Conventional wisdom suggests putting it up in a tree a distance away. Bears do not seek out people but they will seek out their food. Skunks, possums, raccoons and porcupines will do the same. Oh, and Raccoons can open a cooler, even one with a latch, they're very clever. Sturdy boots at all times when walking in the woods, this area does harbor timber rattlers.
Sound carries in the Gap area.
Might not be as necessary if you're going to stay on the river with the guide, but it's still a good idea, kids being kids.