C208 PLT LANDS AT CVG BUT IS UNCERTAIN IF LNDG CLRNC WAS ISSUED.

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20 NM FROM CVG VORTAC; CINCINNATI APCH NOTIFIED ME OF RWY 18R APCH IN USE. COMPANY DID NOT PROVIDE ME WITH AN APCH PLATE FOR RWY 18R INTO CVG. I NOTIFIED APCH AND HE SAID TO EXPECT RWY 18L. I WAS RADAR VECTORED TO HDG 355 DEGS APCHING FROM THE S FOR A DOWNWIND LEG INTO RWY 18L. I RPTED HAVING A VISUAL OF THE ARPT. APCH AT CVG CLRED ME FOR A VISUAL APCH TO RWY 18L. ALL OTHER ACFT WERE LNDG INTO RWY 18R. I HEARD ANOTHER AIRPLANE ASK FOR RWY 18L AND CVG APCH SAID; 'DENIED DUE TO NOISE ABATEMENT.' APCH NEVER CHANGED ME OVER TO TWR; BUT IT SOUNDED LIKE 1 GUY RUNNING TWR FREQ AND APCH. I WAS MONITORING TWR; BUT HAD NOT BEEN GIVEN THE CHANGEOVER. I COULD NOT GET A WORD IN TO APCH AS I REACHED THE RWY DUE TO RADIO CONGESTION. I LANDED ON RWY 18L NOT REMEMBERING IF I HAD BEEN CLRED TO LAND OR NOT. CVG APCH CLRED ME OFF THE RWY ON T5; THEN S ON TXWY T TO ACR CARGO RAMP. HE NEVER SPOKE ONE WORD TO ME OTHER THAN TAXI DIRECTIONS. I BELIEVE THAT THE CTLR (ATC) CVG WAS WORKING BOTH FREQS WITH 1 PERSON AND THAT THEY WERE NOT PREPARED FOR AN AIRPLANE THAT WAS UNABLE TO ACCEPT AN APCH TO THE RWY IN USE. I BELIEVE THAT DUE TO FATIGUE CAUSED BY A LACK OF SLEEP FLYING CARGO AT NIGHT AND THE HIGH STRESS OF NAVING TO CVG CIRCUMVENTING TSTMS IN IMC LED TO A VERY POOR DECISION. I BELIEVE THE CORRECTIVE ACTION AS A PLT WOULD BE TO SEEK MEDICAL HELP FOR SLEEPLESSNESS AND TO CHOOSE NOT TO FLY WHEN SUFFERING FROM FATIGUE. THIS WOULD HELP WITH BETTER DECISIONS AND PROVIDE WITH MENTAL ALERTNESS (MEMORY).