The Hike itself : it is 10 mile hike one way, 8 mile to town of Supai to check in and 2 more mile to camp grounds. At first the hike down goes on switchback but later is smooth decline . it took me 4 hour going down and 6 hour coming back up.
1) while Hiking down be prepared to not slip on switchback with smooth sand and stones, i didn't use poles but it is suggested.
2) The Incline is little harder than the decline,so be prepared and rest well for hiking back
you can find services to take your luggage of 32 lbs to camp grounds for $400 round trip. we carried our own luggage and it is totally doable. you could also use mule service or Helicopter ride to take you down and back up.But hiking is a visual treat and test to oneself.
3) Carry food and water for your hike. once you reach Supai food is available at a cafe on certain time only and it is expensive as everything needs to be delivered by mule service from hilltop. also suggest to take water bladders instead of bottles to avoid extra weight. i had a 2 liters water bladder with me.
4) There is little to no shade while hiking so start the hike early. we started at the first light