It's important... but less important than you think it is. While your location certainly plays a role in your photo shoot, it should never be the focus. The people, relationships, and memories are far more important than the background, and that will show in your RWP photos.
Robin has years of experience with hundreds of different backgrounds and knows it's the PEOPLE who make the shoot memorable. Don't stress about location. Choose one that "fits" your style, and trust that Robin will take care of the rest.