Hi Michiganders!
I am in the Detroit area and have found that we just need to make our own way here. There are a lot of things to do and ways to keep our children engaged, we just have to seek them out.
My advice is to join every museum you can and stalk their calendars for events. You will run into families that have children just like yours. Storytimes at the library will also yield a few peers, usually!
My district has a gifted magnet school which has been a godsend. We're starting our second year there.
