No, you do not need to pay an entrance fee. Please enter through the front visitor center building (to the left), not the Atrium building. Please let the front desk attendant know you are there for Symone Witcher's Wedding and they will be able to direct you to the Azalea Woods Gazebo.
Your place inside the Gazebo will be marked with a name tag on the bench where you will be seated.
It is located at the Azalea Woods Gazebo. Once you enter the park through the visitor center, you will see the Fairy Garden to your left, follow the paved path all the way around to the left side where you will see the Gazebo on the hill.