FLC OF A B727 MADE A GAR ON SHORT FINAL TO A NON TWR ARPT DUE TO A SMALL CESSNA DELAYED IN TAKING OFF FROM A TOUCH- AND-GO LNDG. THERE WAS NO CONFLICT DURING THE GAR SINCE RPTRS MAINTAINED VISUAL SEPARATION DURING THE GAR. HOWEVER; THE FLC COMPLAINED THAT THE NEWLY BUILT TWR SHOULD BECOME OPERATIONAL DUE TO SUCH A COMPLEX MIX OF TFC.

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ON APCH TO THE BOZEMAN ARPT (GALLATIN FIELD; MT) ON SEP/XA/98 TO RWY 30; WE EXECUTED A GAR DUE TO LACK OF SPACING WITH A LIGHT ACFT ON THE RWY. THE CHRONOLOGY IS AS FOLLOWS: WE RPTED A L BASE AT 1500 AGL. A LIGHT ACFT RPTED TURNING BASE TO FINAL. ANOTHER ACFT RPTED TAKING OFF ON RWY 12; OPPOSITE THE DIRECTION OF THE CIRCUIT WITH A 10 KT TAILWIND. WE QUERIED THAT ACFT TWICE ABOUT TAKING OFF OPPOSITE THE FLOW OF TFC; AND THE PLT REPEATED THAT HE WAS STILL GOING TO TAKE OFF. APPARENTLY CHANGED HIS MIND AS WE LATER SAW AN ACFT TAKE OFF ON RWY 30. ANOTHER ACFT YET RPTED TAKING OFF ON RWY 21; WHICH CROSSES RWY 30. I QUERIED THAT ACFT AS TO HIS SPECIFIC INTENTIONS STATING THAT THERE WERE ACFT ON FINAL. THAT ACFT RESPONDED BY STATING HE WOULDN'T BE A PROB IN RELATION TO US. I SPECIFICALLY ASKED THAT PLT WHETHER HE WAS GOING TO HOLD FOR THE LNDG ACFT (LNDG ACFT WERE OUR ACFT AND THE ACFT AHEAD) OR TAKE OFF. THAT PLT RESPONDED HE WOULDN'T BE A PROB PROVIDING NO USEFUL INFO. THE FE VISUALLY ACQUIRED THE ACFT DOING AN INTXN TKOF ON RWY 21. THE FACT THAT THIS ACFT WAS TAKING OFF FROM THE INTXN WAS NOT STATED DURING HIS XMISSION. OUR ATTN WAS NOW FOCUSED ON THE ACFT DOING A TOUCH-AND-GO AHEAD OF US. IT BECAME APPARENT THAT THE ACFT MIGHT NOW BE DOING A FULL STOP. THE ACFT REMAINED ON THE RWY AND HAD NOT LIFTED OFF. I QUERIED THAT ACFT'S INTENTIONS AS TO A FULL STOP OR TOUCH-AND-GO. THE PLT RESPONDED 'TOUCH-AND-GO' AND LIFTED OFF SHORTLY THEREAFTER. THE SPACING BTWN OUR ACFT AND THE TOUCH-AND-GO ACFT REQUIRED A GAR. THE CAPT MADE A L TURN DISPLACING OUR ACFT SAFELY TO THE L AND A TIMELY RADIO CALL WAS MADE AS TO OUR INTENTIONS TO AVOID ANY TURNING CONFLICTS. WE KEPT THE TOUCH-AND-GO ACFT IN SIGHT WHO REMAINED ON RWY HDG. OUR ACFT TURNED XWIND AND A NORMAL APCH AND LNDG WAS MADE. CONTRIBUTING FACTORS IN THIS MATTER ARE THE FOLLOWING: INCREASING DENSITY OF AIR TFC INTO BOZEMAN AS A POPULAR DEST. LACK OF A CTL TWR WHICH HAS BEEN BUILT AND IS CURRENTLY UNMANNED DUE TO A LAWSUIT OVER WHO WILL STAFF THE TWR. INCREASED COCKPIT WORKLOAD TRYING TO LOCATE AND DETERMINE THE LOC OF AN ACFT WHO ANNOUNCED HE WOULD TKOF OPPOSITE THE DIRECTION OF THE CIRCUIT WITH A 10 KT TAILWIND. MORE ATTN FOCUSED ON AN ACFT TAKING OFF ON THE XING RWY 21 WHO DID NOT CORRECTLY STATE HIS POS AT THE INTXN OF RWYS 30/12. RECOMMENDATIONS: GET THE TWR MANNED ASAP. MIXING A HIGH VOLUME OF LIGHT ACFT WHO FLY AT SLOW SPDS WITH ACR TFC AT HIGH APCH SPDS IS UNSAFE.