Are both the freshwater and marine portions taking place based out of Gainesville? Or are they in two different cities?

Also, I see a Gainesville Airport. Why not fly into that instead of Tampa or Orlando? I've never been to FL, I'm completely unfamiliar with the areas.

But I am VERY excited about attending the Plantfest, just need more info to decide if I can afford both the freshwater and marine...

-Jason