I've been caught more times than I care to admit lol.
Some good to go places:
ICBC parking garage - pay for the parking that's all
Horizons parking lot on BBY Mt
Seymour Demonstration Forest
Stanley Park by the tennis courts. This place is active most evenings so you might want to keep that in mind. Ex GF and I used to have a good time and then go into the Fish House for replenishment.
Not so smart places:
Stanley Park by the hollow tree. Lots of potential for Asian tourists to take pics of you. VPD on horseback go there for photo ops with tourists too. Busted there with a warning.
Cap College parking lot used to be awesome but they hired numerous rent a cops to keep an eye on the parking lot and break ins etc
Anywhere in W Van geez, this place used to be a gem but a whole influx of Duddley Dorights moved in. We were in midst 69 and really enjoying ourselves when we heard
OMG they are having sex in there! You two, I'm calling the police!
Funny thing was that turned us on more because of the sense of urgency to get the fuck out of Dodge lol. We got out of the car to straighten ourselves before departing and we ended up doing it against the side of the car. Memorable quicky!