Yes, only use Official Airport parking on airport grounds, park up, short walk to terminal building.
Mileage read and tattoed on the old noggin.
I usually park it as near to the terminal building at the airport my flights departing from, so no.
Yes, always check around car, and so far over the years, no damage found.
Use the service so much, particularly at Gatwick, I'm on first name terms with most of the excellent staff there around the car parks, and in the offices.....they must send me at least 3 e-mails a week offering handsome discounts throughout the year. :-)