by Brent Frazee You won’t find many crappie-fishing boats like the one guide Joe Bragg operates. In the nation’s heartland, crappie fishermen use everything from bass boats to john boats to aluminum V-hulls to chase the speckled gamefish. But a 24-foot, 4-inch long bay boat? Let’s just say Bragg defies customary behavior when he takes his customers fishing on Milford Lake in northeast Kansas. But Bragg says there is a method to his madness. His “Crappie Yacht,” as he calls…