You could night dive the Destin Jetties, but you can't get into the park at St Andrews (PC Jetties) in the evening unless you are camping. At sundown they close the gates and the only way out way in/out is to use the gate code they give you if you are camping. However, if one was to to get a campsite for the day and get the code ........
If you have an annual pass you can get the code, too, and get in after regular hours.