Havasu Falls Grand Canyon is a great adventure. The best way to get the max enjoyment during your trip into this mystic canyon is to plan.
Consider the weather, then make choices concerning hiking gear. How physically fit are you? I grade the hike a "B," but that's relative to my fitness.
My point is that you might consider taking a helicopter into Supai Village or go by horseback. It's your call.
Here's are links to more great sources of information on Havasu Falls Grand Canyon:
Grand Canyon Havasu Falls
Oasis Guides
Havasupai Falls
Havasu Falls
Havasu Falls Hiking
Havasu Falls Arizona
That should get you started nicely on Havasu Falls Grand Canyon...