NPS with lots of info:

https://www.nps.gov/grca/planyourvisit/havasupai.htm

The official Havasupai site:

http://theofficialhavasupaitribe.com/

 UNTIL FURTHER NOTICE: Due to overwhelming reservation requests  our online reservations will be unavailable.
We are working with Sunrise Reservations to make online reservations available in the future. Please check back.

There is however lots of info and of course phone #s to call.

While one of the world's most beautiful places, the abuse of pack animals has been documented and exposed.  They just don't care about the bad publicity because they're always sold out?

https://www.gofundme.com/havasupai-horses-billboard-campaign

Here is a video about fruit tree planting and you'll see many other videos about the Havasupai.

I want to support the tribe and obviously there's not shortage of visitors.

I just wish the Havasupai would stop condoning this cruel abuse of the pack animals!