Jen,
We are part of a co-op and haven't really had any trouble. There are a few parents who are convinced I am the world's greatest teacher based on where DS is at but for the most part everyone has been supportive. A few parents have even taken the time to ask questions regarding DS. Last year when he went to school, no one shut me out. Now that he's back to H/S, it's like we never left.
Our co-op is primarily for play and social activity. We have parkday every week and field trips. There is a math class ongoing but most of it is just play.
