A walk to the end of the moraine trail produced common and least terns, as well as the king eider we were looking for, with 2 surf scoters. The eider was a lifer and ABA bird 250 for me.
On the way back we saw saltmarsh sharp-tailed sparrows, and some of them actually stayed in view for a couple seconds. Easily my favorite sparrows.
A walk onto the ceder island trail as the sun was setting yielded seaside and sharp-tailed sparrows, with the seaside sparrows being a lifer. Fighting mosquitos and gnats on the way back to the car, we found a willow flycatcher and more ibis to end the day.