The best guidance towards HHN crowds will be daytime crowds, and per the most recent earnings, UO is basically back at 100% of its pre-COVID attendance since less international visitors are basically offset by increased domestic interest.
As long as the event happens (I'm not saying it won't!), I'm figuring the crowds could be relatively the same as the past couple years if only for the fact the the event is happening and there's pent up demand to overcome int'l people who can't make it.