MLG MAKES NUMEROUS APCHS AND MISSED APCHS. UPON LEAVING AIRHOLD; DISCOVERS WRONG INFO IN FMC.

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AFTER LEAVING HOLDING PATTERN OVER SSR VOR AT 10000 FT FOR THE LDA APCH RWY 8 AT JNU; AK; I REALIZED THE APCH WAS PUT IN FMC INCORRECTLY AND WE WERE FLYING TOWARDS BARLO INTXN INSTEAD OF LYNNS. WE WERE A FEW MI FROM BARLO WHEN I DISCOVERED THE ERROR. WE WERE DSNDING TO 5200 FT AS IS THE MEA ON THE SSR-LYNNS TRANSITION. WE MADE A STEEP DSCNT FROM BARLO TO THE MDA AND ENDED UP BACK ON THE PROPER PROFILE. THE MISSED APCH PROC FOR THIS APCH TAKES YOU BACK TO BARLO AND THEN TO SSR WITH A XING RESTR AT BARLO OF 3000 FT; SO WE WERE WELL ABOVE MINIMUM ALT ALONG THIS SEGMENT. CONTRIBUTING TO THE ERROR WAS THE HIGH WORKLOAD IN THE HOLDING PATTERN AT SSR; WATCHING FOR IMPROVED WX AT JNU; FUEL CONSIDERATIONS; ALTERNATE ARPT CHANGE; OBTAINING AMENDED RELEASE; ICING CONDITIONS; IN THE HOLDING PATTERN. ALSO BECAUSE ANOTHER AIRPLANE WAS HOLDING AT SSR BELOW US; WE HAD TO MAINTAIN 10000 FT ON THE APCH UNTIL WE WERE 5 NM N OF SSR. I PUT THIS IN FMC AS AN ALONG TRACK WAYPOINT FROM SSR. MY MAP SCALE WAS SUCH THAT I DID NOT HAVE THE NEXT WAYPOINT ON THE MY MAP; WHICH SHOULD HAVE BEEN LYNNS BUT BECAUSE OF THE ERROR WAS BARLO. HAD I SEEN BARLO ON THE MAP; I MIGHT HAVE DISCOVERED THE ERROR IN THE FMC ROUTING AND FIXED IT PRIOR TO ACTUALLY FLYING THE WRONG WAY. LESSON LEARNED HERE IS TO DOUBLE-CHK ALL FMC ROUTINGS ESPECIALLY BEFORE AN APCH. SUPPLEMENTAL INFORMATION FROM ACN 289769: SINCE WE WERE VERY HIGH; TERRAIN WAS NEVER A CONCERN AND ROUTING IS ACTUALLY PART OF THE BARLO 6 DEP. WE CONTINUED; MISSED THE APCH BACK TO SSR AND HOLD. NEXT APCH (FIFTH) SSR VIA LYNNS AND LANDED WITHOUT INCIDENT. CONTRIBUTING FACTORS: HIGH WORKLOAD; MODERATE ICING; NIGHT; IMC; TRACKING FUEL; CHANGING PLANS FOR ALT AND NUMBER OF APCHS. WE ARE BOTH EXPERIENCED AT FLYING IN SE ALASKA'S NON RADAR ENVIRONMENT AND ALWAYS XCHK RADIALS; DISTANCE AND NDB BEARINGS. I JUST GOT OVERLOADED AT THAT POINT IN THE FLT. WX WAS CHANGING AND WE WERE TRYING TO FIT INTO A WX WINDOW. SHOULD HAVE SLOWED EVERYTHING DOWN AND XCHKED PRIOR TO COMMENCING FOURTH APCH.