They're right off fire island ave in babylon villiage. Go down fire island ave and bear left at the bait shop when you see pier 44 restaurant. You need a permit to get in after 6pm, but they will let you stay until at least 8 or 9 if you get in before 6. I always go when it's near low tide.
Thanks for the info. I'll make sure to arrive before 6, & save the permit fee.
BTW, does anyone have good locations in Nassau County? Would I need a permit?