Hey! So you were were correct. Here’s the response from Juliana Lopez below in case anyone else is wondering the same!
“Accepted Students Day is more of a social event to meet other students and faculty. Pre-Orientation is designed to guide you in registering for classes and provide you information on what to expect for your field placement.
We encourage you to attend both. If you can’t attend Pre-Orientation please let me know and I will send you an electronic guide.”