Guests can still stay in the parks...but they can’t ride anything. CMs scan magic bands at the entrance of every ride and if you are not staying at a resort you can’t enter the queue...So if you’re already IN the park for the day and they have EMH that evening in that park how do they know if you’re staying at a resort?
I know for the paid parties like Mickey’s Xmas party etc they kick everyone out of the park that’s not wearing the party band, but what do they do on EMH evenings?