That's an interesting question and one which I have wrestled with a lot! I'm drawn to raw foods (but more of "raw foods meets Weston Price" at the moment) but here in the PNW it would be very difficult to achieve using wholly local, seasonal foods. It's often seemed to me that most raw foodists' diets are not sustainable from a locavore standpoint (e.g. lots of nuts, tropical fruits, superfoods etc) especially if lots of complex raw recipes are used.
That being said, it's a great diet for cleansing and health generally - so I feel personally conflicted! A sustainable/local raw diet is probably achievable if you're living in CA, FL or other tropical/subtropical climates but difficult if living up here in the north. However, I think you could make it "more" local by freezing a lot as the PP said, sprouting your own seeds/grains and relying on what is available. The raw diet is pretty restrictive as it is and I think placing even more restrictions on it would make success pretty tough - good luck!