Autumn in coastal Georgia and the Carolinas brings clear, crisp days free of heat and humidity. It’s the perfect time of year for golf. The slanting sun filters through the palmetto fronds and moss-draped oaks. The salubrious air carries the salty aroma of the ocean and the pungent scent of the Lowcountry, the broad maritime band of tidal rivers and brackish marshland that softens the mainland before it meets the sea. The PGA Tour’s McGladrey Classic concludes on Sea Island’s Seaside Course this weekend, but many more resort and daily-fee courses beckon from a fertile, semi-tropical archipelago burnished with ideal conditions.