It sounds like you attended a poorly run conference that was not able to accommodate your disability and still refused to accommodate you after you were forced to self-advocate

All conferences I've been to are good about offering suggestions for near-by childcare or even on-site child care for all parents. If that wasn't offered, that's more evidence the conference wasn't run well. It's not appropriate to have a 1 year old babbling over a speaker giving a presentation and the organizers should have quietly spoke to the person caring for the child and removed them from the situation.

I don't think that has anything to do with CoCs.