Over the last couple of summers I have come across couples having sex in their car, and happy to have you watch. Only late at night as I have passed by noticing a car parked, usually around 11pm to midnight
We have found that the sugarloaf carpark off Church Rd to be pretty mean. Either late as or really early in the morning. There ona fairly regular basis.
Usually on Friday/weekends there is one or two cars that congregate in the main carpark. They don't mind being watched if you're discrete. Late at night when the place is deserted
We've seen couples fucking here who didn't mind us watching a couple of times now. Also one of our favourite spots for a late night romp in the bushes! Always late at night when the tourists and the boy racers have given up. Not sure if they lock the gates any more - only a short walk up the hill if they do.