Tom, I was re-reading this thread, looking at pictures and when I looked up Carnival Capers I saw Brad's field clump shot...it is stunning!!! Sometimes I have trouble imagining what a clump would look like because none of my plants are up to 'clump size'. That one is moving up to 'absolutely must have'!!
I looked to see if there was a clump shot of the iris you have listed as Travel Trader and could not find it in the ATP database or on the AIS wiki (under TB's at least). Are you sure that's the correct name?