Thanks, oxfordman. Have you checked out this location lately? I may be wrong, but I think they have updated the area with a newer (and unfortunately poorer) image. The tide appears to be way out in this one, well beyond the end of the "boat", which is still somewhat visible. I also checked a different spot near there that I'd marked as a possible, but unlikely wreck and it was completely gone. Probably some random debris that washed away.

So I guess I couldn't 100% swear it's the Shaunee site, but it seems like the most likely spot for it to be. There's only a short stretch in the bay where the large dunes directly hit the ocean at that angle. Their shapes and the coastline in the pic seem to match, but I guess landscapes can change. Assuming it's the right place though, it seems a rather unusually drastic change to me as well. I can't think of another explanation for it, anyway.