On the 31st of October we will depart on a kayak trip that will take us along the front of all 13 of Georgia's barrier islands. On this coast, the dominant natural force is the tide. Like a heart pumping blood through the body's vital organs, Georgia's tides pump a tremendous volume of water in and around the barrier island, into the sounds, and the marshlands. Life has adapted to and become dependent on this natural process in ways great and small. For 10 days we shall become a part of that process.