Beeing here, nearby the canyon, is an amazing nature experience. You have to be with your eyes wide open to admire and take care of yourself.
People of the reserve are kind with tourists, but visitors must respect all the limits set by the authorities.
There are a lot of wonderfull views from the side, and maybe you want to experience being on the glass horseshoe... you don't need it! All you'll can get is the remember, they don't let you take pictures by your own (even with gopro camera or celphones). But it's on you!
The enjoy the visit you're going to walk and walk under the sun, so, you must use the right clothes, shoes, hat, and sunblock. Drink watter frequently 'cause this is going to last a few hours.