PLT OF A NORDO SMA ACFT EXPERIENCED DIFFICULTY FOLLOWING THE INTENDED PROC FOR LNDG; TAXIING AND TKOF DURING A SPECIAL EVENT AIR SHOW CONVENTION DUE TO A LACK OF COMPLETE INSTRUCTIONS IN A NOTAM FOR THIS PURPOSE.

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DURING TIME OF INCIDENT WITTMAN ARPT SPECIAL ARR PROCS FOR NORDO ACFT WERE IN PLACE. THE APPROVAL RECEIVED IN THE MAIL FROM OSH TWR STATES 'JUL/XZ; AUG/XD PROCS ARE IN EFFECT. UPON LNDG; NO ATC/GND PERSONNEL WERE AVAILABLE FOR OUR ACFT TO CROSS ACTIVE RWY 18R. NO PROC WAS STATED FOR WHAT TO DO IF 'FLASHING STROBES' COME ON AFTER NORDO ACFT HAS ENTERED THE NORDO TFC PATTERN; SO WE JUST FLEW BY AND DID NOT LAND AND ENTERED WHEN STROBES TURNED OFF AGAIN. THEN WE WERE NOT MET BY FAA PERSONNEL ON GND TO CROSS ACTIVE RWY. UPON DEP; WE WERE TOLD BY FLY-BY SAFETY THAT 'AS FAR AS FAA WAS CONCERNED THAT AFTER THE AIR SHOW THAT THE CONVENTION WAS OVER AND NO NORDO DEPS COULD TAKE PLACE. THIS IS NOT HOW THE NOTAM IS WRITTEN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE RPTED THIS INCIDENT IN THE INTEREST OF IMPROVING THE 'NO RADIO ACFT' PROC INSTRUCTIONS FOR OSH FLY-IN. HE BELIEVES THAT INSTRUCTIONS SHOULD INCLUDE PROCS TO USE FOR ACFT THAT HAVE ENTERED THE ATA BEFORE THE 'STROBE LIGHTS' GO ON INDICATING LNDG NOT AUTHORIZED AND THE DESIGNATED PERIOD TO INCLUDE TIME AFTER THE EVENT TO LEAVE THE ARPT UNDER THE SAME PROCS. ALSO; FOR THE 'FLAG PERSONS' TO BE STATIONED TO HELP DIRECT THE NORDO ACFT ACROSS ACTIVE RWYS DURING THE LAST DAY OF THE EVENT. HE STATED THAT THERE WAS NO CONTACT BY THE FAA OR ANYONE ELSE WITH REGARD TO THIS INCIDENT.