Ok so this hike will work your tail feather for sure. We had originally tried to do this hike a few weeks earlier with my 5 yo nephew, and I'm so glad that we ended up on a different trail that day. Came back out to try and get it right.
We took a short detour to check out the old abandoned magnesium mine slightly off the path. The trail does get a little bit "crumbly" in spots. Very important to make sure you are watching closely. One false step and you may do a little tumbling. There was 5 of us, all mostly moderate hikers so luckily we didn't have any trouble. My friends did scare the crap out of me when I was in the abandoned mine.. but that is beside the point.
My BF actually showed us up, by hiking all the way up to the bell arch... the rest of us were happy just to get to the overlook and have some lunch.
I would highly recommend sunscreen and/or a hat. My friend was sunburned and I had massive sun headache no matter how much water I drank. I was doing some complaining going uphill... but my butt will thank me later (was sore for a few days) This one definitely gives you a great workout and the views are pretty awesome. I had left my gloves at home, and definitely would have rather had them on.
At first I couldn't figure out why the hike was called Liberty Bell... until we got just past the arch and you can totally see the bell, complete with a rock or etc to be the clapper. It's really pretty cool and I can't even tell you how amazing the Colorado River looks. Once you get to the overlook, I highly recommend taking the extra hike up an over the to the right. That view is spectacular.