From memory: 1984 Reno; 1986, Lake Charles; 1987 Lincoln; 1988 Virginia Beach; 1989, 1992 Tri-cities WA;
1990, 91, 93 Lawrenceville; 1994 Lubbock, 1995 Chicopee, then Muncie forever
1980 maybe Dayton; 1982 maybe Seguin TX; 1985 maybe Chicopee
failing everything else, look in the yearly November or December issues of Model Aviation for Nats reports.