If you truly have to leave on Sunday dont do it. I was there for a storm a couple of years ago that was a little over a foot and was stuck there for 4 days. When I finally left the back roads still had not been touched. I was able to leave by driving through tire tracks people with 4x4's had made. So to answer your question. I would not chase on the island itself. But Salisbury might be a good spot.
I am going to edit this and add If you can stay for a few days it is worth it. Nothing better than standing on the beach with 35 MPH winds and pounding snow. It is quite a sight to see.