Most of the "Branches" of the AIS have them, Tom: HIPS, The Median Iris Society, and The Tall Bearded Iris Society, for sure do. You must be a "member', and meet certain requirements, depending on which 'group" you're with. Last year was my first year as a HIPS display garden, and I had a blast doing it ! I'm considering applying for one in the Median Society, also. In for a penny, in for a pound