Seal Cruises Freeport Weekends in April 2016 Join the Riverhead Foundation as we sail from 28 Woodcleft Avenue in Freeport, Long Island aboard the Captain Lou Fleet to view winter harbor seal populations throughout Hempstead Bay. A naturalist will be on board to discuss biology and behavior of seals and other marine life encountered. There is a heated cabin and warm beverages available. Reservations are requested. 50% of all proceeds are donated to the Riverhead Foundation for Marine Research.