Nadie, since you weren't the host, you shouldn't be the one submitting the list of attendees. @Seryse ni Cousland would be responsible for that, since she was the host/organizer (also, she'd surely want to get the credit for organizing. ;) ). That said, I'm also not sure if it would count, since...
The form has a spot to include who attended, so I would assume the host filling out the form would keep track of attendance. I could of course be wrong, though.
That said - when I clicked the link just to take a look at the form, it gave me a bit of trouble (said it needed permission) until I...