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. I always suggest that all group members have a whistle for hiking trips so that if somebody gets lost they can be located.
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. I can give you some idea of what to expect up here though. Depending on when you come here, nights can still be cool, so be prepared. Also, the ticks have been especially numerous this season because of the heavy spring rains, so do bring a good supply of insect repellant. Sun is strong on the water so ditto on the sunscreen.