Morning trips almost always start at 7-7:30AM (even though you see options to book at a later morning hour).
Afternoon trips start depending on when the morning trip gets in. Usually between 1-3pm depending on the time of year.
*IF you do not see an available slot for the day you want, it is better to call and make sure. Sometimes there are openings and the calendar does not update right away.*
You will be notified after the booking to make sure everything is correct. Thank you!