I went through notes I had from when we were shopping for convention space back in 2014/2015. We were there in March, June, August, and December. One thing we noticed was the lack of any conventions at CSR when we visited. They were just starting a load in for one, but that was it.
As for "noise" from the convention, well, the only rooms near it are Casitas and even then those rooms have the Back of House spaces for the lobby between the lobby areas and the guest rooms. It's an odd layout too for their convention space, very long and narrow rather than more square so it extends very far south from the lobby. You should be fine if there's a convention there when you are.