Yes they do fireworks every year at the Flemming Meadows end of the lake. There is a cove that's nick named 4th of July cove where all the houseboats hang out. It gets to be a pretty good party. It's near Blue Oaks and across the lake from the private houseboat marina. You get a perfect view from the roof of your boat. Be sure to rent the houseboat from Don Pedro Marina not Mocasin point. Mocasin point is at the other end of the lake and it's a 16 mile trip in a slow boat. It's the same boats and the same company just different location. Watch out for the sheriff when your in your ski boat. They work OT that weekend.
Look for a private houseboat named "High Maintenance" with a 20' Eliminator tied to it and stop by and say Hi.
Gary