I have had coyotes cross roads/trails where my truck was parked and almost run into it. I also captured video of this triple earlier this year where I had 3 coyotes almost surrounding my truck.
Coyotes don't seem as concerned with vehicles at night. However with that said, I have had just as many times where coyotes have popped up on a hill, looked right where my truck was parked and took off. It never hurts to get some separation just in case.
If I have a good hide for the truck, I don't go very far. If I don't, I will at least try to get a few hundred yards away.