I feel very fortunate to have been to many great state and national parks. My most visited one would be a local state park that offers plenty of hiking trails, picnic areas and lots of kids activities. My favorite one, though, is Caladesi Island State Park on the Gulf side of Florida, near Clearwater.
First, the beaches at this park are amazing. I've been many times (my parents lived near this park for many years) and it was never crowded like the nearby beaches of Clearwater and Tampa. If you get there early or stay late depending on the tide, you can see so many amazing creatures and shells. It's very peaceful, far removed from the hustle and noise that usually crowds a beach. You park and take a ferry to the island. Ferries travel back and forth at thirty minute intervals. The island also features a handicap-accessible beach which is amazing. The beaches are always clean. I just can't say enough good things about this beach.
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