Thanks Ron,
It looks like I would need the $2/year per email address plan since I have 6 groups and 186 addresses. I'm sure that could be cut back to about 100 if I sent a Google Analytics code out with the messages to see who is actually opening them. I don't think the membership would go for the $200 for what's been free, especially since most aren't chapter members.

I started searching a bit and see Mailchimp has a free plan for up to 2,000 addresses and 10,000 messages per month.