When it comes to Charleston anglers, John Irwin is a legend. He has been fishing Lowcountry waters since he was a toddler and knows the inlets and cuts better than anyone. Today, he is one of the leading guides in the now-booming saltwater fly-fishing industry. Here, he shares some wisdom from the water—from first-timer tips to bucket list destinations to the perfect pant length for a keeping hems dry during a day on the boat.