I've been reading here for years and years but just recently joined and post rarely. Personally, I suspect that she probably did meet up with someone for some recreational reason and/or left with them for somewhere else for whatever reason. Especially if her car was parked away from the water so she could see their vehicle approaching. Especially if she thought her car would be safe there until she could retrieve it. It's just their lifestyle. Maybe the landing was just a known midway point for them.
Above snipped and BBM:
Welcome and good post! :wagon:
So, if you take the distance from HE's place to PTL, and then go that distance in the other direction, where do you end up?