With access from South and North Kaibab trails and the Bright Angel trail the corridor campgrounds are the most popular for good reason. They are not easy trails, but have water, developed campgrounds and great views!
Other Backcountry Sites
Outside the main campgrounds there are amazing backcountry campsites and trails for more experienced Grand Canyon hikers. These trails are not maintained on a regular basis, don't have a sure supply of water and offer much more of a challenge.
Off Trail Routes
If you've hiked all the Grand Canyon trails one of Grand Canyons many off trail routes can offer you a true challenge. These routes require real canyon knowledge and planning and should not be undertaken lightly. The reward for all this work is solitude and a real adventure!
Havasu Falls is located outside the park on the Havasupai Reservations. This western Grand Canyon backpacking destination is extremely beautiful and unique. It is also one of the canyon's more mellow hikes.