We have never actually camped at St. Andrews State Park, but checked out the campground while on a camping trip to St George Island State Park.
We were not impressed with St George Island SP, but we loved St. Andrews. It is a large campground, with waterfront, shady sites. Some sites have kayak/canoe access right from your site. We also saw several of the rare Red Headed Woodpeckers.
Some of our favorite sites: # 04, 06,12, 15, 42,67,136. We had taken a little drive to check out several parks and we didn't really have time to review all the sites but these were some of our favorites. I checked Reserve America yesterday and found they are almost completely booked! I read something recently that this is one of the most popular parks in Florida. We're going to try to stay there sometime in the next few weeks if we can find a nice site.