Herrington South launches the fireworks from the entrance channel jetty, the channel will be closed just before and during the display. The only bad spot is down wind, last year we anchored north of the channel and what little wind there was was from the south so we were under the smoke, not a deal breaker, but it would have been better to have been upwind.
I'll add HHS really puts on one of the best firework shows on the bay.
You're lucky not to have had any hot cinders land on you or your sails!!