i have seen one car get jammed in park after a tow , when i had steel doors and roll up windows i would put in park after i pulled the straps tight. Now i have glass doors and lexan windows. So yea i winch it in, tie it down and its still in neutral. However i have been chocking the wheels in case it does get loose. But as mentioned before, i have added opening the trailer door and peek inside to my fuel stop routine. Cant check things too many times!