Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 55; Flight Crew Total 675
Communication Breakdown; Situational Awareness
Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action
Airport; Human Factors; Procedure
On IFR flight plan I was cleared for an RNAV Approach. I was monitoring the CTAF while still with ATC.  There was someone ahead of me on the RNAV Approach; so I was second to land.  With the airport in sight; I canceled IFR and changed frequency; kept transponder number.  Another plane announced it would enter downwind and land after me.  Another plane announced in area and would be number four.  With each new plane arriving to the area; the Fixed Base Operator announced winds and preferred runway.  The plane ahead of me cleared the runway.  On short final; I saw a headlight at the far end of runway rapidly approaching. I announced that I was going around for plane on opposite side of runway. I climbed and turned slightly right.  The plane from the other direction was rolling on the ground and about midfield took off and turned slightly right. I then announced that I would be staying in the pattern.  I then landed uneventfully.  He came and found me to apologize. He said that he had keyed in the wrong frequency and had been announcing his intentions to land on the opposite direction runway.
GA pilot on short final landing at a non-towered airport reported a conflict with an opposite direction arrival which had been transmitting their runway intentions on the wrong frequency.