I was there the 5 days before the storm. They are behind the dunes and about 6 ft. elevation. Storm surge was 5-6 feet. Photos of business had about 2-3 ft of water on the main road and in the buildings on Perdido Island by Flora-bama. Gulf Shores photos looked a tad better. I'd suspect most of the camp sites are okay, but not pristine. All the building in the park are raised. Its a beautiful park. 90-100 mph winds so the trees will be looking ragged, lots of branches down I would imagine and the marsh and lakes may be looking ragged.
You will have to give them a call to find out for sure.