FL bird IDs needed

I spent 5 days in Englewood, FL at the in-laws. It is on the Gulf coast south of Sarasota. Went to 2 parks. The first was Indian Mound Park on Lemon Bay. I think this might be a Laughing Gull.

Another

There are at least 2 types of gulls in this pic. Laughing Gulls at bottom? Ring-billed in middle? Not a clue as to the ones flying.

I think these may be a kind of plover. Semipalmated perhaps. At first I thought they were sandpipers, but the bill and legs were wrong.

Western Sandpiper?

Together for comparison.

1,2 - Laughing Gull
3 - four Laughing Gulls, surrounding a Ring-billed Gull in the middle
4 - Ruddy Turnstone
5 - Dunlin
6 - Dunlin & Ruddy Turnstone

Resin

Wow Resin, you are fantastic. Thanks for the fast reply. I didn't even see those Turnstones and Dunlins in the books until you mentioned them. The non-breeding feathers are so different I just glanced at them. Two new ones to add to my list for sure. I would like to see them in their summer colors, but I guess I'd have to go pretty far north for that. I also got to add Brown Pelican and White Ibis, but those were so easy to identify. Thanks again, Becky