How to hike to Havasupai Falls
How I did it: I have hiked to Havasupai Falls from the Colorado River and down from Hualapai Hilltop. Both times were just day hikes so it wasn't as difficult as carrying a backpack.
If you want to visit and you are willing to go off season, I suggest staying at the motel in Supai. That way you carry less gear and can enjoy the area. Bring some form of entertainment - cards, a book, something for the nights.
This is a trip that is worth doing if you enjoy the remoteness and the desert scenery.
Lessons & tips: Stay at the lodge. Expect that you will create your own entertainment. Talk to the locals.