Your Willets look like Red Knots...although I'm not sure why they aren't in breeding (alternate) plumage yet? Your EXIF says 5/12 which seems late for them to be in that plumage.
I had issues uploading the pics. They all show for me. I'll try to upload the last two below.
They didn't look right for Willets, at least the ones I've seen before. There were several in the bunch, but that picture shows the color the best. They were working the shore line, probing with their bills.
Now I can see them all. That last shorebird is a Willet. In fact I think it is an Eastern Willet, but I am never 100% sure of the Eastern vs Western Willet thing.