| 1997 | Doubletree Hotel and Conference Center, Portland, OR, View Abstracts |
| 1996 | Pheasant Run Resort, St. Charles, IL |
| 1995 | University of Arkansas, Fayetteville, AR |
| 1994 | Palm Beach Garden Marriot Hotel, Palm Beach Garden, FL |
| 1993 | University of Maine, Orono, ME, View Abstracts |
| 1992 | Indiana University, Bloomington, IN |
| 1991 | YMCA of the Rockies, Estes Park, CO |
| 1990 | Sheraton Hotel and Conference Center, Concord, CA |
| 1989 | Hyatt-Regency Hotel, Knoxville, TN |
| 1988 | Syracuse, NY |
| 1987 | Continental Regency Hotel, Peoria, IL |
| 1986 | YMCA of the Ozarks, Potosi, MO |
| 1985 | Camp Kern,Oregonia, OH |
| 1984 | University of Michigan Biological Station,Pellston, MI |
| 1983 | Natural Bridges Resort State Park,Slade, KY |
| 1982 | WyalusingState Park,Prairie duChien, WI |
| 1981 | Ozark Folk Center,Mountain View, AR |
| 1980 | CampWapsi-Y,Central City, IA |
| 1979 | Lyman Lodge,Excelsior, MN |
| 1978 | BablerMemorial State Park,Chesterfield, MO |
| 1977 | Bradford Woods,Martinsville, IN |
| 1976 | StarvedRock-MathiesonState Parks,Oglesby, IL |
| 1975 | Glen Helen Nature Preserve,Yellow Springs, OH |
| 1974 | WyalusingState Park,Prairie duChien, WI |
