Adam, I would risk all of my worldly possessions for a first round at Whistler's. That said, I have never heard of anyone's car being broken into there. It's not like it's Dabney...
With a map (you know where to get one?
), you will have no problem navigating the course and the underbrush is minimal. Just remember where all of your discs go when you throw from the Top of the World... oh... and throw down from there, not out.
Jealous... I remember my first Whistler's round...