Suggest you look at Shell Point in Crawfordville about 6 miles west of St Marks. This is a sailing/boating community 30 miles south of Tallahasse and has a one third vacant marina. It has hosted a number of cats. Also consider
Carrabelle further west but there you have to contend with river
current and it is more
remote than Shell Point car wise. Also check the historical stats on
hurricane strikes by county when making your decision. Good luck.