I've had some truck BJ's in and around White Rock Lake, some in the woods surrounding it and once bent the lady over and went doggy style not too far from one of the roads.
Also parked in the back of an apartment complex on Buckner and opened my truck topper door and lowered the tailgate and did some standing mish & doggy. Man those were fun times.
Once while walking down a trail in Broken Bow State Park (OK) I saw a young couple wrapped in a blanket trying to be quiet as I walked past. I heard sexy grunting and then shushing! They were WAY too close to the trail and easily seen, but I just grinned and kept walking.