I agree with erno. If you get the opportunity, try and get out there for dawn/dusk. I'm sure you'd be able to get amazing shots of the sun setting/rising and cresting the top of the canyon. I always try and sneak a few photos of people when I'm out places. Especially there as people tend to like to climb out in crazy places. But yeah, the 10-22 would be awesome for some extreme wide stuff, though when I went it would have been nice to have a super tele too... Some pretty random things out there. Have fun!