Glen Berry , Jul 15, 2012; 07:06 p.m.
Did that very tour on May 10th of this year. Yes - book in advance - the sooner the better. The Chief Tsosie tour is very good - particularly if "Rob" is your guide - he's also an accomplished photog which was a huge help. I took my tripod (which was a huge mistake - given the number of people in the canyon - others will argue for the use of a tripod). I just did the Upper Canyon, so can't speak to the Lower Canyon. Some tips - use the widest lens you have, and don't even THINK about changing lenses once in the Canyon. You'll find the very fine white sand gets into everything. In fact, while travelling to and from the Canyon in the pick-up truck - I'd recommend you have some type of dust protection for your camera/lens because those truck wheels kick up plenty of dust. I'd also recommentd using something like black electrical tape to seal the connection between camera and lens - again - for the dust. I also used a damp chamois to clean up the camera and lens once were were done - worked great. Suggest you set your camera to "cloudy", in AV priority, around f8. It'll be plenty hot during the time you're there - take water as well. Good luck!