Get in touch with Nathan of Kayak Chile in Pucon.
nathan@kayakchile.net
He can set you up with rentals, guide and shuttles if needed. He is a great source of beta down there.
www.kayakchile.net
I would contact him asap in case he is out of town with a group. He might even be at the Futa
On the Futa, talk with the rafting companies when you get there and you should be able to find some help.
Hope that helps,
Have fun.
-Sean
Alpine Kayak