We have been to both North and South Rims usually in the fall--Sept. Suggestions--hiking is great in Nat'l Forest on North Rim. No crowds due to most visitors are on tour buses that only stay 1 night at North Rim Lodge. And the big buses cannot drive to the overlooks--too big for road. South Rim good advice provided by others--add take a helicopter trip over the canyon. Or take a really great ride by going on a float trip thru the canyon, we did in 2016--188 miles, 5 nights. Left the rig at Page, Az for float trip.