C170 PLT LOST CONTROL OF ACFT AFTER LNDG; DEPARTING RWY AND STRIKING TAXIWAY SIGN.

Narrative

WHILE COMPLETING THE FINAL LEG OF A JOURNEY THAT BEGAN 3 DAYS EARLIER; I LANDED AT ZZZ. FOLLOWING A 3-POINT LNDG AND ROLLOUT; THE ACFT BEGAN TO DRIFT L OFF THE RWY; APPLIED R RUDDER (EXCESSIVE); THE R WING ROSE UP AND THE L WINGTIP IMPACTED THE RWY SURFACE. THE ACFT DEPARTED OFF THE R SIDE OF THE RWY IN THIS ATTITUDE; EVENTUALLY STRIKING A TXWY SIGN. AFTER THE TXWY SIGN; IMPACT ON THE R HORIZ STABILIZER; THE ACFT RIGHTED ITSELF AND I WAS ABLE TO TAXI THE ACFT TO THE PARKING RAMP. AWOS RPTED WINDS AT 030 DEGS AT 11 KTS; LANDED ON RWY 33. THE TOUCHDOWN WAS NOMINAL; THROTTLE WAS AT IDLE. I RETRACTED THE FLAPS AND THOUGHT JUST AFTER FLAP RETRACTION AND DURING SUBSEQUENT ROLLOUT 'DID IT!' (AS IN SUCCESSFULLY COMPLETED A 2200+ MI XCOUNTRY); AND WITH THAT THOUGHT THE ACFT STARTED TO DRIFT L. I BELIEVE THAT I LET MY GUARD DOWN FOR A FEW CRITICAL SECONDS AND THEN OVERCORRECTED TO KEEP THE ACFT ON THE RWY. I THINK MY TRAINING FOR A TAILWHEEL SIGNOFF WAS APPROPRIATE; BUT THAT I WAS MENTALLY UNPREPARED FOR THE SUCCESSFUL CONCLUSION OF A LONG XCOUNTRY FLT. AT THE OUTSET OF THE FLT; I WAS AWARE THAT THERE WERE A NUMBER OF HAZARDS TO BE OVERCOME; BUT WHEN I SUCCESSFULLY ARRIVED (OR SO I THOUGHT) AT MY FINAL DEST; I WAS ELATED; AND THIS LED TO MY FAILURE TO STAY FOCUSED ON MAINTAINING CTL OF THE ACFT.