We were lucky. In 2017 my son was only 2 months old for Gen Con, so he just slept in one of those baby wraps things on either his Mother or myself. All the background noise in the hall was actually nice as little babies like noise. So he slept most of the Con while we would game. This year we left him at home as he is a very active and grabby kid now and that would have been problematic, but not everyone has the option to leave their kids at home.
I agree with Marian, if you are coming with the a stroller, use the umbrella kind. But it is hard to get through the hall just walking, a stroller sounds like a nightmare to push.