Yes, at some (maybe most or all?) AHS shows it seems they either sell or auction daylilies. I don't know this first-hand, just from having seen sell lists on Google from some of the regional sites that held shows. So, if you can search out a website for the group that is sponsoring your show they might even have a list that you can research cultivars on ahead of time. At least that is how it appears from having google-visited those sites. I'm sure others will be able to fill in the picture better from first-hand experience.
