The Glades will be hell in the summer unless you take the airboat tours from the Indians. If you sit still for more than a couple minutes the gnats will carry you away. Stay completely away at dawn and dusk for the mosquitoes. The tours are usually great as the prop keeps the air moving and the bugs are screwed. Although we are in a major drought and I am not sure what areas will be accessible.

I grew up in Hollywood and now live in West Palm. Not to sure of the places you are looking for in Ft Lauderdale as I have my own skiis and don't go that far to eat. As for the 4th, they will have fireworks displays all up and down the coast as these will probably be the only areas around here allowed to light them off due to the dry conditions.

Just get ready to be hot and humid. Cool water is your friend. have a good time.