Everglades Ammo is down there, Mark 7 Reloading as well. Generally quite a bit of the larger matches in florida are hosted on matchsignup.org only a few are on practiscore.
I reload in a wood shed, but keep all my components inside the house.
Gun Craft Inc (Ruskin)
Hansen Range & Gun Club (Punta Gorda), they host the custom gun classic around November.
Wyoming Antelope Club (Clearwater), they host the factory gun classic the first weekend of December.
Shoot GTR (Gainesville)
Volusia Gun & Hunt Club (Volusia)
Universal Shooting Academy (Frostproof)
OK Corral (Okeechobee) Area 6 Championship will be there in two weeks.
I'm sure there are many others, but off the top of my head these are some of the more popular facilities.