If the judges place the gallery far enough from the line, conversations in the gallery shouldn't be a problem. Unfortunately, I've run of lot of HRC tests where the gallery was way too close to the line or the holding blind. Even had holding blinds in the gallery. In my opinion, the placement of the gallery should be based on its distance from the line, not how well the gallery can see the test. If the gallery can't see all of the test, so be it.