They usually start coming in June and are there through August. In my experience, there are alot of them there in July. I can't speak to staying at the same hotel as the groups---as we typically stay in Moderate hotels on property. However, I can say that in recent years they seemed to have toned down the energy (ie chanting) and they appear to be broken up in slightly smaller groups from what I have seen compared to the dozens of them that would fill up an entire line que.