Hi Joanna,
Everyone sets up on the beach about 1/4 mile to the left of Key Sailing (as you look at the water). Set up anywhere after the parking lot turns to gravel. You can back your trailer onto the beach through the gaps in the low wood railing that separates the parking lot from the beach. You can leave the trailer on the beach. The cat in the link is too far down. He is at the boat ramp.

http://maps.google.com/maps?hl=en&ie=UTF8&ll=30.338093,-87.14536&spn=0.001683,0.003401&t=h&z=19