My question from this: how WILL Disney achieve reducing capacity? I honestly do see them only allowing admission to on site guests only. I mean, you can't expect people to spend thousands of dollars and travel potentially thousands of miles, without there being a guarantee they get into the park that day. (Normal) people won't do it.
So my guess is, for quite a while, on site guests only will be allowed into the parks. They can track potential attendees for the day through the amount of registered hotel guests, and of course through the booking of FP+. They would obviously have to limit the amount of resort rooms allowed to be booked, which I think is in line with the speculation that only a few resorts open initially. Maybe a couple in each category?
Maybe allow the Florida resident AP holders a certain allotment, too? Or, once resort guests have met their quota, locals could show up that day and take a chance on getting in if there's extra spots? Not sure.
I'm guessing park hopping won't be allowed, since that would make it a lot harder to predict attendance at each park, and people aren't going to want to build plans around park hopping only to be told later, sorry, we're full, go somewhere else. Easier to just not allow it.
But who knows
My take away: the chance of us taking our vacation to WDW in 2021 is looking pretty slim