I'm nothing to do with the conference I'm afraid, just a member of both SETP and RAeS - and thus on the right eMailing lists.
These conferences tend to be largely organised by busy FT professionals so I'd not expect a rapid response. But, if all else fails, give it a while then contact SETP HQ in LA, who might be able to put you in touch with somebody else.
And speaking as another little-aeroplane person, don't let the fact that your test flying is for PFA put you off. There's a lot of serious flight-testing done at our end of the weight spectrum and we could do with a few more like us within the two big flight test societies.
G