1) Not a problem, providing our own transportation & to such events is customary.
2) Depends on the nature of the NDA. Is it a specific requirement for RWT, or just a general catch all? CO, for example, has never required a NDA for its mega-DO's.
3) Normal way of doing business here. DL & CO have always vetted people for past events.
4) Is there something we don't know that should be a source of concern?