AFTER LNDG AT 1B2 ARPT; THE PLT OF AN SMA ACFT WAS ADVISED BY THE FBO ON UNICOM TO PARK BEHIND A BONANZA. THE SPOT WAS NOT SUITABLE AND WHILE TAXIING TO ANOTHER LOCATION; THE PLT STRUCK THE BONANZA'S TAIL.

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BECAUSE OF A WARNING I RECEIVED FROM ATC; WHEN I REQUESTED FLT FOLLOWING SERVICES ON A DIRECT FLT FROM HANSCOM FIELD; MA; TO KATAMA AIRPARK IN MARTHA'S VINEYARD; MA; I MAY HAVE UNINTENTIONALLY VIOLATED THE BOSTON CLASS B AIRSPACE. AFTER LNDG AT KATAMA AIRPARK; I WAS TAXIING MY ACFT TO THE TIE-DOWN AREA. I WAS ADVISED ON UNICOM FREQ BY THE FBO TO PARK MY ACFT BEHIND A PARKED BONANZA. AFTER STOPPING MY PLANE BEHIND THE BONANZA; I COULD FIND NO TIE-DOWNS; SO I ELECTED TO TAXI THE ACFT TO ANOTHER PARKING AREA. WHILE EXECUTING A 90 DEG L TURN BEHIND THE BONANZA; MY L FOOT ON THE BRAKE AND RUDDER OF THE PIVOTAL L MAIN GEAR SLIPPED AND BEFORE I COULD JAM ON BOTH BRAKE PEDALS; THE LEADING EDGE OF MY PLANE'S R WING STRUCK AND KNOCKED OFF THE TAIL CONE AND BENT THE TRIM TAB OF THE BONANZA AND AT THE SAME TIME CAUSING A DENT AND HOLE APPROX THE SIZE OF A QUARTER IN MY R WING. THE OWNER OF THE BONANZA WAS NOTIFIED OF THE INCIDENT. I BELIEVE FATIGUE WAS A FACTOR CONTRIBUTING TO THE INCIDENT INASMUCH AS I HAD SLEEPING PROBS THE PREVIOUS EVENING. ALSO; I BELIEVE A WING WALKER WOULD PREVENT A RECURRENCE OF THIS INCIDENT.