four or six, it's all better (to me) than the crap they call roads here in Pittsburgh
Honeymoon Island State Recreational Area. Admittedly, I lived in the Town n' Country part of tampa which is half an hour minimum from USF.
you need to check different websites. DeSoto is a nice place, but it's way down at the tip of the penisula. No where near the closest beach to Tampa. Heck, the causeway is lined by beaches if you don't mind swimming in the bay instead of the Gulf. Go here
http://tbo.com/life/travel/beaches/