There are some local car parks listed on this site, but it's doubful that anyone will tell you where the more secluded ones are just yet.
There has been a fair amount of local bad press around recently, so as new people asking for locations, I'm afraid you may have to wait until you become known and established on here before being given such info.
Not doubting your integrity, just being careful. After all, you may be a reporter or something
Perhaps see you around the parks one of these dark nights
Tracy-Jayne & Jon