Well, it depends where you want to boat/fish in Chatham. For Stage Harbor, Nantucket Sound and the Monomoy flats and rips you should put in at the Bridge Street Ramp next to Stage Harbor Marine. As someone else indicated, Outermost Marine
will also work. For Pleasant Bay and quicker access to fishing in front of the lighthouse, you should put in at the Ryders cover maina. Regardless of where you put in, parking is always a problem. Good luck.