SMA ENTERS DOWNWIND FOR WRONG RWY. CLOSE PROX WITH SECOND ACFT.

Narrative

I WAS INBOUND FOR LNDG AT BRIDGEPORT; CT. I HAD DEPARTED MY HOME BASE AT LEDGEDALE (BROCKPORT; NY) I WAS TRACKING OUTBOUND FROM KINGSTON VOR AND HAD CITY OF BRIDGEPORT IN SIGHT ABOUT 20 MI OUT. HOWEVER THIS WAS THE FIRST TIME I HAD BEEN TO BRIDGEPORT AND I APPARENTLY GOT DISORIENTED. I WAS ADVISED TO RPT MID-DOWNWIND ON RWY 29R. I HAD DRIFTED TOO FAR S OVER THE CITY AND GOT DOWNWIND ON RWY 24; WHICH I RPTED TO BRIDGEPORT TWR. A GRUMMAN HAD JUST DEPARTED RWY 29 AND WHEN HE SAW ME; HE VEERED TO THE R AND RPTED A 'NEAR MISS' TO THE TWR. I HAD THE GRUMMAN IN SIGHT ON HIS INITIAL LIFT-OFF AND AT NO TIME FELT THERE WAS ANY DANGER. AFTER I REALIZED I WAS DOWNWIND FOR RWY 24 INSTEAD OF RWY 29; I MAINTAINED A PATTERN ALT OF 1010 FT MSL AND PLANNED TO CROSS RWY 29 MIDFIELD AS IT WOULD BE THE SAFEST ALT TO CORRECT MY DISORIENTATION. I CONTACTED THE TWR UPON XING RWY 29 MIDFIELD AND WAS CLRED FOR LNDG ON A R DOWNWIND FOR RWY 29. AS NOTED THE WX CONDITIONS WERE CLR VMC. THE ARPT WAS BUSY AND I WAS ABLE TO LOCATE ALL THE PLANES IN THE PATTERN INCLUDING THE GRUMMAN THAT HAD DEPARTED RWY 29. I WOULD REPEAT THAT AT NO TIME DID I FEEL THERE WAS A DANGEROUS SIT.