POSSIBLE UNAUTH PENETRATION OF TEMPORARY RESTR AREA.

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PRIOR TO A PVT PLEASURE FLT TO BOEING FIELD (BFI); I OBTAINED A WX BRIEF. THE FLT WAS TO BE MADE VFR FROM HARVEY FIELD (S43) TO BOEING FIELD (BFI). WX WAS GOOD VFR; AND REVIEW OF NOTAMS SHOWED NONE THAT WOULD EFFECT THE FLT. THE FLT DEPARTED S43 PROCEEDED TO THE NE EDGE OF BELLEVUE; WAS 11 NM NE OF BFI. BFI ATIS ADVISED OF TEMPORARY FLT RESTR IN EFFECT FOR AIRSPACE OVER THE HYDROPLANE RACE COURSE. I ATTEMPTED TO CONTACT SEATTLE FSS FOR COMPLETE INFO AND RECEIVED NO RELAY ON 122.50. I REMAINED OVER DOWNTOWN BELLEVUE AND CONTACTED BOEING TWR ON 118.30 AND ADVISED MY POS WITH CURRENT ATIS FOR LNDG. THE CTLR INSTRUCTED ME TO PROCEED INBOUND AT WHICH TIME I ASKED HERE 'IF I REMAINED N OF THE I-90 BRIDGE (MERCER ISLAND FLOATING BRIDGE) WOULD I BE CLR OF RESTR AIRSPACE (TEMPORARY FLT RESTR). I RECEIVED NO IMMEDIATE REPLY; SO I ASKED A SECOND TIME; AND SHE REPLIED YES! I WAS THEN INSTRUCTED TO ENTER R DOWNWIND FOR RWY 31R AND RPT ABEAM THE KINGDOME. I PROCEEDED FROM DOWNTOWN BELLEVUE W TOWARD THE W SHORE OF LAKE WASHINGTON VIA THE EVERGREEN POINT FLOWING BRIDGE. UPON REACHING THE W SHORELINE I TURNED SBOUND AND ENTERED THE DOWNWIND FOR RWY 31R; RPTED ABEAM THE KINGDOME THEN WAS CLRED TO LAND RWY 31L. A NORMAL APCH AND LNDG WAS MADE. I DEPARTED BFI TO THE NW TO AVOID THE TFR AIRSPACE. FOLLOWING MY RETURN TO S43 I SPOKE VIA LANESLINE WITH SEATTLE FSS. THE POTENTIAL PROB AROSE FOR THE FOLLOWING REASONS: COMMERCIAL WX NOTAMS DID NOT REFLECT THE TFR. A CURRENT COPY OF THE PUBLISHED NOTAMS WAS NOT AVAILABLE AT S43 PRIOR TO DEP. A LIVE WX BRIEF TO REVIEW NOTAMS WAS NOT OBTAINED. I WAS UNABLE TO CONTACT SEATTLE FSS VIA RADIO WHILE AIRBORNE. CONFUSION EXISTED WITHIN THE PRINTED TFC. SEATTLE FSS WAS UNSURE OF ACTUAL EFFECTIVE (DAYS/DATES). THE POTENTIAL PROB COULD BE AVOIDED IN THE FUTURE BY: OBTAINING ALL NOTAMS VIA LIVE BRIEF WITH FSS PRIOR TO DEP. OBTAINING A COPY OF CURRENT PUBLISHED NOTAMS PRIOR TO DEP. DO NOT RELY ON COMPUTER WX BRIEFS FOR ALL NOTAM INFO!