A lot of illustrators are interested in writing their own children's books and I am often asked about local critique groups. Also, if you write or want to write graphic novels, this may be helpful from a purely story structure standpoint.
Dave Richardson (who you may know from Blue Marble) is doing a 3 hour writing workshop for the Kenton County Library system this Sat. (June 18).
It's for beginners/intermediate. He is covering some basics ( like formatting), but also story arc, voice, character, and a few others. There will be a couple of writing exercises and time to share, and an hour for submitted ms critiques with the group.
It runs from 10-1 just down the street from the Kenton County Public Library on Scott Street in Covington (they are remodeling the top floor of the library at this time).
It's also a good place to meet the writers in the KCPL Writing for Children critique group.
They can contact Patti Richards at patricia.Richards@kentonlibrary.org or call the KCPL and ask for her.