Was this at bennett springs? I went last weekend and had some luck with larger dries (probably because of the cicada hatch) but most of the fishing was tough according to everyone I talked to.
if you go to Montauk, be sure to fish outside the park on the Current as well if you have a chance, you don't need a trout tag, but you do need a trout stamp on your fishing license, and less of a crowd, if at all