The setup is on the patio at the back of the amphitheater, behind all the benches. The patio is divided into a smaller area and a larger one. Both areas have railings that separate them from the main walkway running between the patios and the crowds.
From the back of the patio looking to the far side of the amphitheater:
Both patios have a $250 venue rental fee and a $750 food and beverage minimum. The small one holds up to 40 people, while the large one can hold 40 to 100. There is also a $75 setup fee and then a $12.95 viewing fee for each person who doesn't have park admission.
Hope this helps!