I did some Peacock bass fishing down in Panama last year, actually went for tarpon but didn't get one.
We caught a bunch of em, but nothing huge. The patterns that worked best for me were red and white clousers, red and white poppers, and these things;
They float, but dive and wiggle when retrieved. Fishing was best for them early in the morning, or at sunset. Those fish are aggressive as hell, you shouldn't have a problem catching them. I used an 8 wt and I didn't feel over gunned. A 6 or 7 would have been fine as well.
I also use to do some flats fishing in Texas for reds when I was younger. They have a lot more than just reds in FL though. So I can't speak for all of them, but the reds aren't too hard to get, if you can find em.
Look for tailing reds when the tide is going out or coming in, they will forage in the flats for shrimp and the like. They are basically a better looking carp, so if you can catch a carp, you can catch some reds. Gold and copper was always my best colors for those fish. Spoon flies and crabs always worked in TX, and I'm sure they'll produce in FL as well. I like an 8wt for out there, 9 if it's super windy.
Here are some pictures of some of my flies that I use to use in the flats (and whenever I get down there to fish anymore)
Copper cactus chenile shrimp -great for reads
Gold hot glue crab with gold e-z shape and copper flash
Silver and gold epoxy spoon flies.