MissJacks,
Rebeca told me that there can be up to 2 weddings per day at the location. When you reserve a day she will have you fill out a form regarding time of day (the choices she sent me were 4, 5, 6, or 7) and then in addition to choosing time of day, you pick location.
SO, hope this helps!! Everything is pretty much on first come, first serve basis!
JEN