Please go here if you get the chance! This was surprisingly the pinnacle of our trip (no pun intended), and is one of the most awe-inspiring and uplifting places I've been. I will never forget how it made me feel. That place really does feel sacred. I was just wrapped in this incredibly verdant grace. And lest you worry, the hike isn't that difficult (I bet our 3-year-old would have loved it, and if not, she would have at least survived) and there is so much to see that you could walk three steps and stop to soak in another wonder, then walk three more steps and stop again. So basically, if you take your camera, you won't get winded at all because you'll probably be stopping every other second to take another picture.
Have you been? If so, I'd love to hear what you think! It makes me so excited just reminiscing and I feel like I may need to hike that at least a hundred more times in my little lifetime. It might just be worth the 11-hour drive.
P.S. If you'd like, the previous posts about this trip to South Dakota are here and here.