That you need to drive to downtown suggests you might not have much garage space after all?
If we want to park a car in there, it's about an hour of moving stuff out of the way. I stand at the back as a spotter while my wife drives at me. Once she hit me, she turns the car off and climbs out through the back seat. I then climb over the roof of the car.
I wish I was making this up. Glad it's 12 years old with no sun roof. I don't have to feel bad about sliding over it.