IF you haven't already done so, I'd recommend you
contact:
South Carolina Association of the Deaf
SC school for the Deaf
SC-RID
SC Baptist Conference of the Deaf
I'm sure if you explained what you want to do, and how important it is that the signers in your videos/pictures be skilled, fluent signers that you'd be able to get a some additional volunteers.
Where there's a will there's a way.
P.S. I live in Canada ... and (more importantly) due to injuries in a car accident I have permanent injuries (muscle atrophy & weakness, spasms, nerve damage etc) which has made my signing, even after years of rehab (it took me months to relearn how to hold a pencil) easily understandable -but not fluid/clear enough to be a sign model for a website teaching ASL. Otherwise, I would have volunteered myself to help you with your vocab etc.
