Love, love, love hiking Camelback! Great way to burn 800-900 calories in an hour (literally as I use a heart rate monitor when climbing). Bring lots of water and use gloves in case you fall your hands won't get too trashed (also good for the metal handrails during summer).
One thing I do is pick up other people's garbage during my hike - STOP LITTERING!!!
Oh btw, watch out for falling rocks around the handrail portions. No, really.