But for Gartside, the best fishing is on the 34 islands that dot the harbor. Wading the skinny water there offers shots at fish that are inaccessible to boats. For an $8 round-trip ticket, he takes the 20-minute shuttle from the city to George's Island, the site of an old Civil War fort. From there, he hops on a free water taxi that drops him off on any of the smaller, undeveloped islands, some of which allow free camping (Boston Harbor Islands National Recreation Area, 617-223-8666; nps.gov/boha). He fishes the in- and outgoing tides for stripers up to 30 pounds, using his various creations, like the famous topwater Gurgler. At 6 p.m., he's on the last shuttle back to the city.