Yup, I'm in Hillsborough County. Pretty close to the Pasco County line, but not quite there. You know, I've never visited the extension office, but I do know a Master Gardener on this site who volunteers there.
I trust you guys about the fern. It's definitely aggressive, but I don't like to call anything invasive unless it's non-native. I know a lot of people get frustrated by native plants that can be aggressive, but it's like, hey, they were here first. At least now I know it's full on war! And I can tell my dad they're "bad ferns" and that he can do whatever he wants to them (within reason). I'll have to be very careful about chemicals, like I mentioned. I do have those super cool "Resurrection Ferns" and I wouldn't mind some more of them. Have to get rid of these guys first.
Thanks for the help, guys! I love this site!