This has nothing to do with Kevin's reputation. The original poster did not purchase the snakes from NERD. That's definitely not what their genetics guarantee/paperwork looks like, either.
Additionally, the only reptile show in NH is put on by the folks at http://www.reptileexpo.com/nefirst.htm Their fall show is normally in September. Wouldn't be too hard to contact them and see whether or not they even had an August show last year.
$.02...