CENTER CTLR CLEARED ACFT INTO CZN AND ATA AT RDD WITHOUT COORD. OPERATIONAL DEVIATION.

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I WAS ON AN IFR FLT FROM CONCORD TO REDDING MUNI. 60 MI OUT I TUNED ATIS WHICH WAS ADVISING LOC BACK COURSE APCH RWY 16. APPROX 30 MI OUT ZOA ADVISED 'EXPECT ILS RWY 34 APCH AT REDDING.' I FELT THIS WAS STRANGE SINCE ATIS ADVISED OC BACK COURSE APCH RWY 16. I CONTINUED INBND AND SET UP FOR ILS RWY 34 APCH. I ALSO CALLED AND CONFIRMED ONCE AGAIN THAT I WOULD BE MAKING THE ILS RWY 34 AT REDDING. ZOA ADVISED 'AFFIRMATIVE.' I WAS CLRED FOR THE ILS RWY 34 AND BROKE OUT AT ABOUT 1000'. I WAS NOT HANDED OFF TO TWR BUT ADVISED TO RPT CANCELLING IFR BY ZOA WHICH I DID. I WAS THEN ADVISED TO SQUAWK 1200 AND USE CTAF. UPON RPTING MY POS; THE TWR AT REDDING ASKED WHERE I HAD COME FROM. I EXPLAINED THAT I WAS SHOOTING THE ILS RWY 34. I LANDED AND AFTER DISCUSSING THE INCIDENT WITH GND CTL LEARNED THAT ZOA THOUGHT THE TWR OPENED AT 7 AM LCL TIME; BUT ACTUALLY IT OPENED AT 6:30 AM. MY CONCERN IS THAT ANOTHER PLANE COULD HAVE BEEN CLRED FOR TKOF ON RWY 16 AND MET ME HEAD ON AS I BROKE OUT ON THE ILS RWY 34.