TEMPORARY TWR AT UNCTLED ARPT. NO NOTAM.

Narrative

APPROX AM; APR/SUN/95 WHILE LETTING DOWN 15 MI FROM HEMET-RYAN ARPT (UNCTLED); I HEARD 'TWR-LIKE' RADIO COM TO THE AIR TANKERS ON THE UNICOM FREQ. I CIRCLED ABOVE THE TFC PATTERN TRYING TO ESTABLISH COM TO NO AVAIL. WHEN THE PATTERN WAS CLR; I LET DOWN ABOVE THE ARPT EXPECTING TO LAND USING XMITTER INOP ONLY; PROCS. ON FINAL; SEEING NO LIGHT SIGNAL AND HEARING NO COM TO ME; BUT SEEING AN AIR TANKER WAITING AT THE RUNUP; I ABORTED MY APCH. I EXECUTED A HIGH GAR AND AS I APCHED THE XWIND LEG; I HEARD THE AIR TANKER 'CLRED FOR TKOF.' I TURNED XWIND AND SEEING AND HEARING NO ONE IN THE PATTERN; I CONTINUED DOWNWIND. UPON TURNING BASE; A VOICE ASKED FOR MY NUMBER. I RESPONDED AND TURNED FINAL. SEEING NO TFC; RWY CLR; I LANDED. A FEW MINS LATER; I PHONED THE RIVERSIDE FSS AND CLOSED MY FLT PLAN FROM SEDONA; AZ. I MENTIONED TO FSS THAT THERE 'SEEMS TO BE SOME KIND OF TWR OPERATING.' HE RESPONDED; 'THERE'S A LOT OF FIRE ACTIVITY AND THAT WE PROBABLY SHOULD PUT OUT A NOTAM.' UPON TELLING THIS TO THE LCL FBO; HE MADE SOME PHONE CALLS; AND WAS TOLD A 'TEMPORARY MOBILE TWR HAD BEEN PUT UP ACROSS THE FIELD AND THAT IT HAD BEEN OPERATING SINCE THE DAY BEFORE!! AND THAT THE FAA WERE GOING TO ISSUE A NOTAM!' I AM SURE; I'M NOT THE ONLY PLT THAT WAS CONFUSED WHETHER A TWR WAS IN EFFECT. AND IF ONE WAS IN EFFECT; WHY DID THEY NOT TRY TO COM OR USE LOSS OF RADIO PROCS?