We are 56 and 53. We knew it would be a shlep but we sort of practiced for a year and it was terrific! Hiked the S.Kaibab down on a cold October morning. It was warm by the time we got to the river. Stayed overnite at the ranch dorms (comfy enuf after the long hike!), and walked back up Brighty's trail to the south rim. Amazing hikes and amazing being down there. Even hiked a bit up the North Kaibab late in the day and it was a whole separate kind of beautiful. The ranger shows were great as was the ranch food and canteen. We'll never forget it!