I ALWAYS make sure parking is allowed - I never trespass or park in No Parking zones, etc. But still... neighbors are vigilant and wonder why a strange car is parked in their neighborhood. And I'd hate to get towed. So, I made and laminated this sign for my dashboard:
In a stroke of (I think) genius, it's reversible. The flip side, in bold red letters, reads I'M IN TROUBLE - CALL 911. I hope to never need that.
I've really learned some safety skills in this sport.
Take care and happy caching!