At the pier there is zero beach. At least when I went by which was not quite high tide as I recall. The south end of Anastasia Beach is mostly gone. Not really enough to fly a sport kite proper and certainly not enough for a comp. It was a sad sight to be certain. Rob might can chime in on how much beach exists at low tide.
At the fun fly, due to vehicle traffic it was crowded at high tide, particularly if the wind was coming on shore. I flew my early am sessions on the beach at the Holiday Inn and there was plenty of beach. Had 4 great sessions in the early morning, SUL winds. Simply, well...Nirvana!