Blackpacker has an excellent list of ways to stay clean in the outdoors (and yes, there is a section on defecation. That’s why this one goes first).

UT Outdoors gets down into another of those skinny little canyons. Them boys have no fear, I tell ya.

Grand Canyon North Rim blog shows an amazing place you can drive your SUV to (make sure the brakes work; the road goes right to the rim.).

GoBlog links to a true Bible of the Outdoors. New Testament only; all the rest of you gotta make your own.