Do it, its a beautiful area and awesome for herps. Your camera(s) will get a good workout.
Just watch closely for venomous snakes as there are plenty. Use caution, even around the smallest ones. It's tempting to flip a rock or log but you have to be really careful as those baby snakes blend right in, even on the trails.
Pretty cool to find green treefrogs there; you feel like you're somewhere other than IL.