PA32 PLT INITIATES 'PERSONAL WELFARE' ACTION AND LANDS AT K33N ARPT DUE TO DARKNESS AND FOG CONDITIONS. ARPT MGR ALLOWS LNDG EVEN THOUGH ARPT IS NOTAMED CLOSED; BECAUSE OF SNOW.

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I DEPARTED KISSIMMEE; FL; AT APPROX XA30 LCL TIME. RECEIVED DUATS WX BRIEFING FOR RTE AND DEST ARPTS. CHS AND CRE FIRST LEG; 33N SECOND LEG. FILED IFR. FLT BRIEFING NOTAM 33N CLOSED AT NIGHT. ESTIMATED TIME OF ARR AT 33N; DELAWARE AIR PARK WAS SCHEDULED PRIOR TO NIGHTFALL. WX WAS FORECAST VFR; SO NO ALTERNATE WAS REQUIRED AND ALTERNATE FUEL REQUIREMENTS WERE NOT PLANNED FOR. WHEN I ARRIVED AT 33N; THE CTLR ADVISED ME THAT HE COULD NOT CLR ME FOR THE INST APCH BECAUSE OF THE NOTAM. I THEN REQUESTED A LNDG AT DOVER AFB; BUT WAS ADVISED THAT PRIOR PERMISSION WAS REQUIRED 4 HRS PRIOR TO ARR. CTLR THEN SUGGESTED LNDG AT EITHER GEORGETOWN; DE OR MIDDLETOWN; DE. IT WAS ALREADY DUSK. MY DEST ARPT WAS CLRLY VISIBLE EVEN WITHOUT LIGHTS. TEMP WAS 33 DEGS; DEWPOINT 33 DEGS. SLIGHT TRACES OF GND FOG WERE APPEARING FROM THE SNOW PACK. EXPERIENCE TOLD ME THAT IN THE 20 MINS THAT IT WOULD TAKE TO FLY TO EITHER SUGGESTED ARPT; THAT IT WOULD BE DARK AND THE POTENTIAL FOR GND FOG WOULD BE HIGH. I REQUESTED A LOW APCH TO 33N TO CONFIRM NO RWY OBSTRUCTIONS; AND THEN LNDG AT MY DISCRETION. REQUESTED A POP-UP CLRNC TO ILG. IF OBSTRUCTIONS EXISTED; CTLR ADVISED TO REMAIN HIS FREQ; BUT IF I LANDED; TO CALL THEM ON LAND LINE TO CANCEL IFR. I EXECUTED A LOW APCH AND SCANNED THE ENTIRE RWY. IT WAS COMPLETELY CLR. I THEN CLBED INTO THE NORMAL TFC PATTERN; AND WHEN ON FINAL; THE ARPT MGR TURNED THE RWY LIGHTS ON AND AN UNEVENTFUL LNDG TOOK PLACE. IN RETROSPECT; I SHOULD HAVE DECLARED AN EMER AND LANDED AT DOVER AFB. HOWEVER; WITH MY HOME ARPT CLRLY IN SIGHT AND A PERFECTLY WELL RUNNING AIRPLANE IN HAND; AN EMER DID NOT SEEM LOGICAL. I DO FEEL; HOWEVER; THAT SHOULD I HAVE ATTEMPTED TO LAND AT EITHER OF THE OTHER 2 CLOSEST ARPTS AVAILABLE; THE GND FOG COULD HAVE CREATED A POTENTIALLY CATASTROPHIC SIT. A MISSED APCH AT EITHER MIGHT HAVE LEFT ME SO LOW ON FUEL THAT I COULD NOT HAVE REACHED A FIELD WITH AN ILS APCH. THE ARPT MGR AT 33N WAS FINE WITH MY LNDG. THE NOTAM HAD BEEN ISSUED THE DAY BEFORE; BECAUSE SOME OF THE RWY LIGHTS WERE UNDER SNOW. AT THE TIME OF MY LNDG; ALL WERE VISIBLE. I FELT THAT THE CTLR WAS AS HELPFUL AS HE COULD BE UNDER THE CIRCUMSTANCES; AND BY REQUESTING LNDG AT MY DISCRETION; IT WOULD RELIEVE HIM OF RESPONSIBILITY. I HAVE NEVER INTENTIONALLY VIOLATED A NOTAM OR A REG OF ANY KIND; BUT THE DECISION I MADE AT THE TIME SEEMED THE BEST FOR SAFETY REASONS. I SHOULD HAVE DECLARED AN EMER. WHAT CAN BE DONE TO PREVENT THIS FROM HAPPENING AGAIN? COMMUNICATE TO PLTS THAT IF THEY FEEL THEY HAVE AN EMER; IT IS NOT SHAMEFUL TO DECLARE ONE. BECAUSE OF THE POTENTIAL FOR GND FOG; I SHOULD HAVE.