Oh so sorry, wish I had seen this post earlier!
I did go to the sale and spent a bundle! The tree peonies were in great shape, and the intersectionals had huge huge roots! The rockii seedlings were my main interest. I got there an hour before the sale started and I was 4th in line, so I had my pick of everything. The intersectionals were fewest in number and sold out very quickly. I bought 'Sequestered Sunshine'. This year I didn't see any species peonies, which surprised me. The seedlings were a bit smaller than I expected, about 23" root to tip.
HPS does the sale every other year, so contact me in Sept 2017 if you want me to shop for you! I'll do it, because I know what it's like to read about great sales that are 15 hours away. I've driven to Tyler Texas to buy daylilies and roses, so the 3 hour drive to KC wasn't that bad. People with great nurseries near them don't realize how lucky they are!