UPDATE: Just 45-minutes after the link we shared below went live, the Passholder Preview events have been filled to capacity on both days.
The preview dates are either July 9th or July 10th; you cannot choose both. Additionally, you are only allowed to choose one park or the other; you cannot choose different parks on different days.
It's particularly important to pay attention to the fine print below; i.e. Disney transportation will not be provided for the limited events and guests will need to get themselves to the theme park parking lots.
To register for either of these events, click HERE.