B727 CREW LANDED WITHOUT CLRNC.

Narrative

WE WERE RECENTLY FLYING INTO CVG. I WAS CAPT OF THE FLT BUT PERFORMING COPLT DUTIES; IT BEING THE COPLT'S LEG. THE FLT WAS IN DELAY ABOUT 2 HRS DUE TO MULTIPLE GND HOLDS AT OUR DEP CITY FOR TSTMS AT CVG. WE WERE BEING VECTORED INTO CVG TO LAND ON RWY 36L ON APCH CTL FREQ 127.7; HAVING BEEN SENT TO THIS FREQ FROM A DIFFERENT APCH CTL PASSING THROUGH APPROX 4000 FT MSL. IT WAS NIGHT; IMC FLT CONDITIONS; THE FIELD CALLING 600 FT 2 1/2 MI. THE CTLR WAS CONSIDERABLY BUSY; TALKING ALMOST NON-STOP; AND SEEMED TO BE CTLING FLTS INTO BOTH RWYS 36L AND 36R. WE SENSED THAT ATC'S OPS WERE SOMEWHAT DIFFERENT: THE STORMY WX HAD RECENTLY ENDED AND THERE SEEMED TO BE A LARGE SURGE OF INBOUND ACFT; THERE WAS CONFUSION ABOUT THEM NOT BEING ABLE TO GET THE ATIS BROADCAST; WE HAD BEEN PASSED ALONG THE WAY TO WHAT SEEMED TO BE MORE THAN THE USUAL NUMBER OF APCH CTL SECTORS; OR AT LEAST; FREQS; AND FINALLY; WITH OUR LAST APCH CTLR SEEMINGLY BEARING INCREASED RESPONSIBILITIES; WE WONDERED HOW FULLY OPERATIONAL THE TWR WAS. WE ENDED UP LNDG WHILE ON APCH CTL FREQ; WHICH SEEMED TOTALLY FEASIBLE FOR THE GIVEN CONDITIONS; BUT DUE TO THE FREQ CONGESTION; WE NEVER COULD VERIFY OUR LNDG CLRNC. WE EXITED THE RWY AND CONTACTED GND CTL FOR TAXI INSTRUCTIONS; NO OTHER ACFT WERE INVOLVED. IN THIS INSTANCE; I THINK OUR FINAL APCH CTLR; FOR WHATEVER REASON; WAS UNREASONABLY OVERLOADED. ALSO; I'VE NOTICED A TREND LATELY OF APCH CTLRS NATIONWIDE TO VECTOR ACFT IN IMC CONDITIONS IN TFC PATTERNS NOT MUCH LARGER THAN VFR PATTERNS.