Kevin...there are some great campgrounds south of Tampa. We are currently at Ft. DeSoto (which is a Pinellas county park) for one more night. It is thus far my idea of a small piece of Eden.
But, there is also Manatee River and Myakka further south that are quite nice. A county park in Ruskin (on the way to Sarasota) is nice also as most of the sites are river front...the name escapes me at the moment.
So far I don't think we've been asked the age, but often the size. We've gotten some neat little sites because we will fit where the big rigs don't.
Enjoy your trip.
Josie and Craig
"Not all those who wander are lost."
(J.R.R. Tolkein from Lord of the Rings..."Strider's Poem")