Mine is set up on a gravel driveway and there is no way the sides would hit the car unless your car is 10 feet wide. The tent material is pulled so tight there is no movement at all. They have ancors to hold down the garage. They even make special ancors for paved driveways.
I had 93 Ford F150 Lightning (thats a full size pickup) parked in it for years and never had a problem. There is a car or trailer parked in it all the time. Good luck.
