Lake camping in Florida

We are already looking ahead to next year's spring break, which for us is the 3rd week in March. We love to kayak and ride our bikes. Can anyone recommend a lakeside campground where it might be warm in March - maybe Florida or Georgia? We're in Iowa and don't like to have to take more than one night to get to our destination. We love Gulf Shores State Park and Topsail in Destin, looking for someplace new. I think we would like a lake because we have inflatable kayaks, and last year, while kayaking at Gulf State Park, a HUGE alligator swam by a little too close for comfort!