We are going in October also. I wish I could find the post where I read this but I think it said that Universal Studios is the EE whenever it closes at 5:00 for
HHN. And HHN is never (?) on Monday or Tuesday. But I have also read that IOA only gets EE at really busy times of the year so it's possible it may not see an EE at all in October as dixonsontour mentioned. Was that clear as mud?