This multiple day trip is worth the effort. You can begin the adventure on either rim. From south to north, take either corridor trail (South Kaibab or Bright Angel) to Bright Angel Canyon. With reservations, you’ll spend the night at either Bright Angel Campground or Phantom Ranch. Then follow North Kaibab Trail to the North Rim. Reverse the route if you go north to south. But how do you get back when the road distance between rims is 200 miles? You could walk. Or you could take the Trans-Canyon Shuttle (928-638-2820, PO Box 348, Grand Canyon, AZ 86023). It operates between mid-May and mid-October, and for a rim-to-rim, you shouldn’t operate any later in the year than that either.