Most, if not all, credit union ATMs are free for Credit Unions members. Just look for that Co-Op Network Triangular Sign.
I used to bank with my Credit Union and Bofa. Three months ago they want to charge me a monthly fee, I immediately told them that I want to close the account. They said they will give me a 1 year grace period for being a good customer. Once the 1 year grace period is over, I will cancel for sure if they don’t extend it.