I know you can rent Kayaks for the Carmens River at Glacier Bay Sports in Brookhaven and I have seen some people with flyfishing rods out in their Kayaks. I lived in East Islip for many years and seen lots of flyfisherman work the Connetquot River.
Yeah. They destroyed the population for some reason or another. I don't know if they got whirling disease or what but I heard they needed to kill all the fish and start over. I haven't been there in a few years but every time I've been there I've caught fish, and boy did they taste good! I also heard they have since restocked it although the fishing isn't quite what it used to be.
last time i went, which was last spring, i didn't see a single fish rise, nor did i see any swimming in spots that i had previously caught a ton. I hope they have the population back up, its a really nice place to fish.