On halloween horror nights they shift the studios opening time from 9am to 8am. On those days do they still give hour early access to the park for the on property resort level hotels (getting in at 7am).
I don't recall HHN day being a guaranteed 8 am opening but I do recall last year they did have early entry for 7 am during one of my vacations. I was there the first week of HHN, third week of October, and the week after Thanksgiving. I got to valet at about 6:45 am and only one security guard was there. I had to wait for the valet person to open up before leaving my car. I got some great pics on my phone of a Gringott's with only about 20 people in there and the other side near Gringott's that is completely empty. My phone didn't date stamp them so I couldn't say for sure when it was. I think I rode Gringott's about 5 times in a row that morning before 8 am. They were just letting us walk through the pre-shows at first. I love when Studios is open for early entry. This week is IoA and I've only been twice in the morning.
Staying at wdw. So first night is epcot with emh evening next day is us with early entry at 8am so looks like no rest. Hopefully not too many people show up at 7am