Resources

Official information

http://npmaps.com/grand-canyon/

https://www.nationalparks.org/connect/blog/grand-canyon-rim-rim-hike

Lodging

https://www.grandcanyonforever.com/

http://kaibablodge.com/

Personal Experiences:

https://www.rimtorim.org/hike-it/

https://www.earthtrekkers.com/grand-canyon-rim-to-rim-hike-planning-guide/