Jack's Boat Rentals. Choose from among canoes, kayaks, pedal boats, sailboats, and sailboards at the two locations of Jack's Boat Rentals in Nickerson State Park (Flax Pond and Cliff Pond). Sign up for sailing lessons offered at Cliff Pond. Nickerson State Park, Rte. 6A, at Cliff Pond, East Brewster, Brewster, MA, 02631. 508/896–8556. www.jacksboatrental.com.