One trick I recommend ... as often as possible, drive Sky to the dog park. She will quickly associate the car with the awesomeness of the dog park. That should quickly decrease the anxiety.

When I was growing up, the veterinarian was about a 20 minute car ride, whereas the cottage was a 2 hour car ride. For her whole life, the first 30 minutes of the car ride were stressful for her. After the 30 minute mark, she would love the remainder of the ride.