To the OP. YES, they give out bracelets to ONSITE guest, you must show your resort ID, I believe 2 hours prior to closing and get your bracelet. They DO require that you show your ID, so anyone, even guest without it will not get a wristband. Last year, we actually saw someone trying to get on a ride, without the bracelet, and the CM escorted them out.
I do have to say also, it was CROWDED...... much more than during the day. We will skip EMH on our next trip.