Leave Occupants In Car with HVAC On (I can't do it)

[MrBilly]

Does the old school camper mode work (bring the car to a stop and manually set the parking brake in the controls menu, which puts the car into neutral and keeps all systems running since it's not actually in park)?

Yes, works for model 3 just like with my model S. Haven't been camping in either car yet unfortunately, wife wants hotel rooms. But I do this every time I get out of the car to go do something when leaving the wife in the passenger seat, keeps away the complaints of stereo and/or HVAC turning off.