If you're not in a queue, you're most likely in a zone to keep the social distancing, so I have a feeling that people will be hanging out in zones, strictly because there would be nowhere else to put them.
HOWEVER...this brings up the question that resurfaces every once in awhile. How much does it impact their profits if they just open IOA or parts of it to store the 18-20,000 people and would it be worth it to open? I'm not sure if
@Legacy has answered this in detail yet, but I'm curious to see a similar calculation that they did for capacity. Hypothetically, they could also "store" people at CityWalk and when your reservation to enter the park has started, they "page" you.
Just thought of this as well. What if they turn HHN into an attraction in and of itself? Where they move you through the park and each house is a part of a queue? Meaning, if you want to experience HHN, you have to do all of the houses or none of the houses, but at least you get to experience it? I'm sure there are a lot of logistical issues for this, if a house breaks down, etc. people want to ride rides, but I think it's an interesting option. They could also make rides, not apart of the experience this year. Just a thought.