C172 PLT ENTERS CLASS B AND TFR ON APCH TO GPM.

Narrative

TRAVELING ON THE LAST LEG OF A MULTI-LEG DAY; I WAS TRANSITIONING UNDER THE 2000 FT FLOOR OF CLASS B AIRSPACE. I CALLED 10 NM NW OF MY DEST ON THE CTAF; BASED ON PUBLISHED INFO THAT THE TWR WAS ALREADY CLOSED. THE TWR RESPONDED TO MY CALL; INDICATING THEY WERE STILL OPEN; AND GAVE ME A LOCATION TO RPT FOR LNDG SEQUENCE. THE TWR ALSO INDICATED A TFR WAS IN EFFECT OVER A PARTICULAR AREA BUT; BASED ON MY PRESUMED LOCATION; IT WOULD NOT BE AN ISSUE (IN A CALL TO FSS APPROX 1 HR PRIOR TO THIS LAST LEG; THERE HAD BEEN NO INDICATION A TFR IN EFFECT). I QUERIED THE LOCATION OF THE TFR AS I DO NOT FLY IN THIS PART OF THE CITY VERY OFTEN AND WAS NOT FAMILIAR WITH THE STREET NAMES FROM THE AIR. THE CTLR BELIEVED I WOULD PASS WELL AWAY FROM IT; BASED ON MY LOCATION. I WAS USING A TERMINAL CHART; HANDHELD GPS AND LORAN FOR POSITIONAL AWARENESS. I CROSSED A LANDMARK I BELIEVED WAS THE LAKE I WAS LOOKING FOR AND TURNED E TOWARDS THE ARPT ON WHAT I BELIEVED WAS THE CORRECT INTERSTATE. I PASSED OVER AN AMUSEMENT PARK WHICH IS N OF THE ARPT; AND N OF WHERE I BELIEVED I WAS. I IMMEDIATELY TURNED S TOWARDS THE ARPT BUT AM NOT SURE IF; AT THAT POINT; I MOMENTARILY ENTERED THE CLASS B SURFACE AREA (AS IT GOES TO THE SURFACE AT APPROX THAT POINT). GIVEN THAT I WAS ALSO N OF WHERE THE CTLR AND I BOTH THOUGHT I WAS; I AM ALSO NOT SURE IF I ENTERED THE TFR. AFTER TURNING S; I FOUND THE E/W INTERSTATE I HAD ORIGINALLY BEEN LOOKING FOR AND TURNED E. AT THAT POINT; I CONFUSED A SIMILARLY SIZED UNCTLED ARPT JUST S OF MY DEST AS THE CORRECT ARPT. THE CTLR CAUGHT MY MISTAKE AND GAVE ME A HDG AND LANDMARK TOWARDS HIS ARPT AT WHICH POINT I ENTERED R DOWNWIND; OBTAINED A LNDG CLRNC AND LANDED WITHOUT FURTHER PROBS. I WAS NOT FAMILIAR WITH THE TRANSITION RTE I WAS USING TO GO FROM N TO S. I SHOULD HAVE DONE A PRACTICE RUN; IN BOTH DIRECTIONS; WITH SOMEONE FAMILIAR WITH THE RTE TO CORRECTLY IDENT LANDMARKS/FREEWAYS; ETC. SECONDLY; THIS WAS THE FINAL LEG OF A MULTI-LEG FLT AND I WAS MORE TIRED THAN I THOUGHT. MY CONCENTRATION AND SITUATIONAL AWARENESS WERE DEFINITELY NOT WHAT THEY NEEDED TO BE TO TRAVEL THROUGH THIS AIRSPACE AND/OR AVOID THE TFR. HAVING THE TWR OPEN WAS A HUGE PLUS. ON THE POSITIVE SIDE; I MADE HIM AWARE I WAS UNFAMILIAR WITH THE AREA EARLY ON. HE MADE SURE I WAS AWARE OF THE TFR AND HAD ME GIVE HIM POS RPTS SEVERAL TIMES. HE ALSO WAS ABLE TO FIND ME BEFORE I LANDED AT THE WRONG ARPT AND GIVE ME ADDITIONAL ASSISTANCE IN LOCATING THE CORRECT ARPT.