A 7 or 8 foot wave, even though not crested, hitting at or near high tide could really do some washing.
With luck it may have even uncovered as much as it covered some history. 7 Site is on the opposite side, but I would imagine some pretty good sized waves came through the inlet and straight down the lagoon toward the area. But I also understand it is substantially above sea level (?) so no 'surge' probably touched it. Maybe some new clues will be found on the NW side of the island after these strong (high) waves. TBD.