Hi Chelsea - I'm both our township clerk for the past four years, and Chair of our County Library Board since 2010.
I'd encourage you to reach out to an attorney that specializes in library law. We use Anne Suernyck from Foster & Swift: ASeurynck@fosterswift.com.
Anne has helped us in many, many library issues, saving us from troubles downstream.
There are a few others in the state who specialize in library law...if you're going for a library millage and changing the governance structure of the library, it could be very helpful to talk to an attorney who "lives in this space".
Greg Rathje, Pentland Township Clerk, Luce County (in the great UP!)