For a period of about 18 years, I did the hike very year (usually around my birthday in February). The first two times, when I was an avid runner, I ran down and walked up in one day. Would crippled me for a week but I did it for the challenge. The third year I hike down Kaibab, stayed in Phantom Ranch and the next day hiked up Bright Angel. The experience in Phantom Ranch turned it for me... I loved having the time t explore inside the Canyon and you meet the coolest people down there. After several years of that, I planned two days at Phanton Ranch. That was by favorite. The whole canyon area is so lovely... we were able the second day to hike out towards North Rim and enjoy the scenery. Twice I was fortunate enough to hike North Rim to South Rim. Involves a bit of planning but what an adventure. The first time we stayed on the north Rim 2 days and did some signtseeing. Third day hiked to Phanton Ranch. and then we Hiked out the 4th day to South Rim.
I tell people if you have never hiked the Canyon put it on the Bucket List. I can't even describe how wondrous the area is!!!!