Pick Gulf Breeze. Your boat is not to small for the bay, will be the right size. Not sure about your rig size we liked site 32, sites 1-15 are near the front and are very large for you to keep your boat at your site.
Here is a link for pictures of all sites, cut and paste to browser:
http://www.campsitephotos.com/campground/St-Joseph-Peninsula-State-Park
We used to go there every year for a week and loved the place. We have since moved to the coast and have no need to travel anymore right now, we have too much fun here.
