The coast opposite the Hi Rise Hotels, the central area's and the lighthouse area
I just saw your inquery about renting rods. I am pretty familiar with the Island and can say there are no places to rent eqpt. Because I di no trust the airlines to transport my eqpt I have 6 to 8 piece travel rods I carry onboard. Cabellas have a good selection of quality rods at reasonable prices. Right now i have been using an 8 pece 7 weight fly rod I converted to spinning use by adding a large eye at the bottom ( also with materials bought at Cabellas ) Itape the spinning reel on when i need it and mount the fly reel on in the normal manner when fly fishing.
You can get some cheap rods and gear at the large hardware store just outside the airport before you get to the first circle ( rotary for you Bostonians )