A C182 PLT FINDS THAT A NON NOTAMED FIREWORKS SHOW WAS BEING CONDUCTED NEAR HIS DEST. HE WAS FORCED TO ALTER HIS APCH TO AVOID THE DISPLAY AND HE HAD TO TAXI AROUND SPECTATORS SEATED ON THE RAMP AND TXWY.

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DEPARTED CGI RWY 2. WX WAS VFR WITH NO CEILING AND UNRESTR VISIBILITY. ACFT WAS A C182. DEST WAS SIK; 19 MI S OF CGI. DEP AND CLBOUT WERE NORMAL. AFTER TURNING TO A HDG OF 175 DEGS FOR SIK; I OBSERVED A FIREWORKS DISPLAY IN PROGRESS AT A TOWN ABOUT HALF WAY TO SIK. ABOUT 10 MI N OF SIK I OBSERVED ANOTHER FIREWORKS DISPLAY NEAR THE SIK ARPT. I ANNOUNCED MY POS (10 MI N) AND INTENTIONS (LNDG AT SIK); ON THE CTAF FREQ; 122.8 UNICOM. 5 MI N OF SIK IT WAS EVIDENT THAT THE FIREWORKS SHOW WAS VERY NEAR THE ARPT; WITH FIREWORKS EXPLODING IN THE L DOWNWIND TO RWY 2 AT SIK. IN ORDER TO AVOID THAT AREA; I ELECTED TO LAND STRAIGHT-IN ON RWY 20. 5 MI N OF SIK I AGAIN ANNOUNCED MY POS AND INTENTION. NO REPLY WAS RECEIVED FROM UNICOM TO EITHER OF THE 2 XMISSIONS. LNDG AND ROLLOUT WERE NORMAL. AS I WAS TAXIING TO THE TIE-DOWN AREA; I PASSED A GROUP OF ABOUT A DOZEN PEOPLE SITTING IN LAWN CHAIRS ON THE RAMP/TXWY WATCHING THE FIREWORKS DISPLAY. I HAD TO MANEUVER AROUND THEM. THE FIREWORKS WERE BEING LAUNCHED FROM A CITY PARK ADJACENT TO THE SW BOUNDARY OF THE ARPT. I HAD RECEIVED 2 BRIEFINGS FOR THIS FLT; BOTH FROM CONTEL DUAT. ONE BRIEFING WAS OBTAINED THE DAY BEFORE THE FLT; THE OTHER WAS OBTAINED THE DAY OF THE FLT. NEITHER BRIEFING CONTAINED A NOTAM ABOUT THE FIREWORKS DISPLAY NEAR THE SIK ARPT. IF I HAD KNOWN OF THIS EVENT; I WOULD HAVE TIMED MY ARR TO MISS IT. MY SUGGESTIONS ARE: DO NOT CONDUCT FIREWORKS DISPLAYS CLOSE TO AN ARPT. IF FIREWORKS DISPLAYS ARE CONDUCTED NEAR ARPTS; THEY SHOULD BE NOTAMED SO THAT THE INFO IS AVAILABLE AND SCHEDULES MAY BE ALTERED ACCORDINGLY. BETTER CROWD CTL IS NEEDED FOR EVENTS OF THIS TYPE SO THAT SPECTATORS ARE NOT ALLOWED ON TXWYS. THE UNICOM BASE STATION SHOULD HAVE BEEN IN OP SO THAT INFO ABOUT THE FIREWORKS COULD BE GIVEN TO ARRIVING ACFT.