I finished the Dyslexic Advantage and I highly recommend it for anyone interested in giftedness and dyslexia. I also got a copy for my father in law and talked to him about some of my concerns today.
The book has recommendations for elementary students and I was happy to see we were on the right track with some of the things we were already doing like HWT, audiobooks and early keyboard instruction. An another recommendation in the book and one that was mentioned here was an Orton-Gillingham based phonics program. I am not sure what the kindergarten uses but I did learn through the resources section in the book that there is a tutoring service which offers that type of program with a dyslexia remediation specialist near our house. So I suppose if he ends up needing a tutor it is nice to have a qualified person nearby.
As for talking to the school and chirping early, it is a small private school my son attended for preschool. Everything is much more informal. The director's vibe for sensory and gifted accommodations (at least at this point) is "how can we help?".
Thanks again for all the input. This forum is a sanity saver.